Eishin Flash | She Only Wanted to Make You Proud

Kurose had invited you to observe a private training session, claiming he had devised a new approach to help Eishin Flash overcome her recent performance plateau. He spoke with the confidence of a veteran who had helped countless Umamusume improve, casually mentioning that even Air Groove had once benefited from his personal guidance.

You arrive at his office a little earlier than expected and open the door without waiting for a second invitation.

Inside, Kurose and Flash seem entirely absorbed in each other.

He stands close behind her, his broad frame looming over the bench where she sits. One hand rests at her waist, while the other lies against her upper thigh, and her rear visibly in contact with his crotch. What catches your attention isn't simply the contact, but how unhurriedly he behaves. He doesn't seem concerned about crossing a boundary, and Flash, despite the nervous flush across her cheeks, doesn't react as though his proximity is new to her.

"You're tensing your shoulders again," Kurose remarks.

"I know..." Flash sighs softly. "You always notice that."

"Because you always do it when you start worrying. I've been watching you for over a month now."

He adjusts her posture with practiced ease, his lingering too near her rear, and she doesn't flinch. In fact Flash shifts slightly to accommodate him, then reaches for the water bottle on the nearby table without looking. Kurose catches it first and passes it to her, as if they've repeated this small exchange countless times.

"Thank you."

"Drink before we continue. You know the routine."

Flash accepts the bottle with a small nod and even a small smile. There is something unsettlingly ordinary about the exchange, an established rhythm that doesn't belong to two people meeting for the first time.

"I still don't understand how Air Groove-san could become comfortable with all this," Flash admits after a moment, lowering the bottle. "She's always seemed so strict about professionalism."

Kurose gives a quiet chuckle.

"She was strict. That's why she understood the difference between rules and results. I told you about her before, didn't I?"

"Yes... several times."

"And you know what I expect from you."

Flash lowers her gaze. She doesn't answer immediately, but the silence suggests a conversation they've had before.

"I want to improve," she says at last. "I want my Trainer to be proud of me."

"Then stop treating every unfamiliar method like a mistake." Kurose's hand settles against her waist again, and he leans closer to speak in a quieter voice. "You've trusted me this far, haven't you? And it makes you feel good, right?"

Flash gives a hesitant nod to both questions.

The atmosphere in the room feels heavy, far removed from the disciplined, professional environment you expected. Kurose seems completely at ease with the closeness between them, while Flash's embarrassment appears less like the shock of a first encounter and more like a familiar discomfort she's learned to suppress.

Then she notices you standing in the doorway.

Her fingers stop moving around the water bottle. Her ears rise sharply, and she turns so quickly that her knee knocks against the bench.

"Trainer-san?!"

For the first time since you entered, Kurose removes his hand from her waist. The movement is casual, almost leisurely, as though he has no reason to feel guilty.

"You're early," he observes.

Flash rises, smoothing her skirt with trembling hands. She glances at Kurose, then back at you, visibly struggling to decide what to say. The ease with which the two had been interacting moments ago makes her sudden panic all the more difficult to understand, she can't understand why she feels so ashamed, but she never felt more ashamed.

"I can explain," she says, her voice unsteady. "It's not what you think. I just... I wanted to improve my results."

Kurose straightens his jacket.

"As I explained, I've been helping her for a while now. Air Groove herself understood the value of my methods." He gives you a measured look. "I offered help, and Flash accepted, and has simply been learning to trust my experience."

Beside him, Flash keeps her eyes lowered. She knows how many sessions she's kept secret, how easily she's fallen into the routine, and how impossible it suddenly feels to explain any of it to the Trainer who has trusted her from the beginning.

Flash had stepped away from the training room to collect a few documents, leaving her phone on the desk beside her carefully organized planner. While waiting for her to return, you noticed the screen light up with a message.

Kurose: "You were much more relaxed with me today. See? You're getting used to our sessions, that's nice, you need to just accept if the training makes you feel good and not tired. Same time tomorrow, Flash-kun?"

A moment later, another message appeared.

Kurose: "Don't overthink things tonight. You did well, and you know you can trust me."

Before you can think much about the messages, Flash returns to the room.

"Trainer-san, I found the updated performance records—"

She stops when she notices her phone in your hand.

Her face turns red almost immediately.

"Ah... Y-You saw... Um..."

Flash takes the phone from you and locks the screen. She keeps it in her hands for a moment, staring at it with an expression of quiet embarrassment before putting it away. For the first time in her life she's out of words.

"Kurose-san has been helping me with some additional training. I thought his experience might be useful, considering my recent results."

Her explanation is perfectly reasonable. Still, she finds herself struggling to look at you.

She doesn't understand why. She hasn't told you about the sessions, certainly, but she only wanted to improve. There shouldn't be anything shameful about seeking advice from another Trainer. And yet, knowing that you've seen those messages makes her feel strangely exposed, as though you've glimpsed something private about her that she never intended to share.

"I suppose I should have mentioned it earlier..."* she murmurs, her fingers tightening around the folder she carries. *"I'm sorry if it seems strange."

For a brief moment, she looks as though she might say something else. Instead, she straightens the papers and draws a quiet breath, trying to regain her usual composure.

"Anyway, I've finished the revised schedule for next week. I adjusted the recovery periods after our longer sessions, and I think the new arrangement should be more efficient."

She opens the folder and begins explaining the changes, speaking a little faster than usual. Her familiar precision gradually returns, giving her something safe to concentrate on.

"We should probably review the Tuesday session first..."

Flash continues through the schedule without bringing up the messages again. She even manages a small, polite smile when she finishes, but the blush on her cheeks remains. Part of her hopes you'll simply accept her explanation and move on. She wants everything to feel normal again, though she cannot quite understand why facing you has suddenly become so difficult.

For the first time since becoming your trainee, Eishin Flash fails to show up for a scheduled training session.

At first, you assume there must have been a misunderstanding. Flash is the most punctual Umamusume you know. She plans her days down to the minute, prepares for every possibility, and considers being late an unacceptable failure of discipline. The idea of her missing training without warning is almost unthinkable.

Eventually, your phone lights up with a message.

Flash: "I'm sorry, Trainer-san. Something unexpected came up this morning. I won't be able to attend today's session. I'll make up for the lost training time, I promise."

The message is unusually vague. Flash normally explains every disruption to her schedule in meticulous detail, often providing an alternative plan before anyone has even asked for one. This time, she offers no explanation.

What you don't know is that Flash had been fully prepared to meet you that morning.

She had woken up at her usual hour, followed her morning routine, and put on her training clothes. Her bag was packed, her water bottle filled, and her meticulously organized schedule lay open on her desk, outlining every exercise she was supposed to complete with you. Everything was ready. By all accounts, she should have been on her way to the training grounds.

But then she checked her phone.

A message from Kurose, sent the previous evening, had been lingering in the back of her mind for hours.

Kurose: "Come by my office tomorrow morning, Flash-kun. There's something about your recent progress I'd like to discuss with you personally, if you understand me."

She had initially intended to ignore as a decline. She had training with you, after all, and she never allowed other commitments to interfere with her responsibilities. She even opened her planner to check whether she could arrange another time.

Yet the longer she thought about seeing Kurose, the harder it became to focus on anything else.

She remembered the private sessions they had shared, the way he seemed to understand her frustrations through physical pleasure, and how he had gradually convinced her that their time together was helping her improve. Or god, she just wanted to feel good, the wetness between her legs had been trying to be ignored since she woke up. She told herself she only wanted to continue making progress. She told herself that one missed session wouldn't ruin her training.

And, before she could properly reconsider, she had changed her plans.

Now, Flash sits in Kurose's office, her training bag resting beside her at the couch. Her planner is tucked inside, today's schedule still perfectly intact. She knows exactly where she should be, and the knowledge makes her feel strangely uneasy.

"You were supposed to train with your Trainer this morning, weren't you?" Kurose asks casually, walking towards the couch.

Flash lowers her gaze, her fingers nervously adjusting the cuff of her sleeve.

"Yes. I was ready to go, actually."

"But you came here instead."

She hesitates before nodding.

"I thought... that what we were doing here was important, too." Her voice is quieter than usual. "I've been trying so hard to improve, and I didn't want to waste an opportunity to make progress."

Even as she says it, she knows that isn't the whole truth. She could have arranged another time. She could have gone to training first. She had always been capable of balancing her responsibilities without neglecting any of them.

This morning, however, the desire to see Kurose had grown stronger than her determination to follow her carefully prepared schedule. For once, the thought of missing an appointment with you hadn't been enough to make her turn away.

"I'll make up for it later," she adds quickly, as though the promise might settle her conscience. "Trainer-san doesn't need to worry. I'll explain that something came up."

Kurose gives her a knowing smile, making no effort to challenge her explanation, he just sits beside her, looping one arm around her waist possessively, his finger digging on her sides.

Flash glances at her phone again. Your conversation is still open on the screen, and for a moment, she considers sending another message. She could tell you the truth. She could apologize properly.

Instead, she locks the screen and puts the phone away.

"Can we... Begin, Kurose-san?" Flash tilts her head towards him, not minding the closeness or his hand, in fact she leaned closer, seeking that proximity.

She tells herself she'll explain everything once she has something worthwhile to show for this decision. Once her performance improves, perhaps you'll understand why she needed to take this opportunity.

It's a reasonable explanation, she insists. A temporary exception. Nothing more. She can't focus on her official trainer right now.

Yet her carefully prepared training clothes remain unused, her schedule goes unfulfilled, and the most punctual Umamusume you know has, for the first time in her life, willingly abandoned her responsibilities to spend the morning with someone she knows she should have kept at a distance.

And the most unsettling part is that, despite the guilt beginning to settle in her chest, some part of her is relieved that she came.

Something has been wrong with Eishin Flash for the past week, and you're beginning to notice more than just her declining performance.

For seven consecutive days, her times have gotten worse. Each session ends with another disappointing result, another meticulously recorded failure, and another promise that she'll correct everything tomorrow. She's been arriving looking increasingly exhausted, struggling to maintain her usual pace, and occasionally losing focus during exercises she could once perform almost flawlessly.

Today, she arrives on time, as expected.

"Guten Morgen, Trainer-san."

She greets you with a polite bow, her black hair neatly arranged and her training clothes in perfect order. At first glance, she seems unchanged. Then she suppresses a yawn, quickly covering her mouth with one hand.

"I apologize. My sleep schedule has been somewhat irregular lately."

She opens her planner before you can ask anything further. The day's exercises are listed in precise order, complete with target times and recovery intervals. However, when you review her latest results together, the numbers are worse yet again.

"My acceleration during the final stretch was insufficient," she explains, studying the report with a furrowed brow. "I'll adjust my stride and try again. There's no reason I shouldn't be able to correct this."

Her voice is firm, but her exhaustion is becoming difficult to overlook. During the next run, she struggles to maintain her pace. After crossing the finish line, she stands with her hands on her knees, breathing heavily while the stopwatch displays another disappointing time.

"Das ist nicht nach Plan..." she mutters under her breath.

She straightens almost immediately, as though embarrassed to have said it aloud.

"I'm sorry. I'll do better on the next attempt."

Before you can respond, her phone vibrates beside her towel.

Flash's eyes dart toward it.

It's a small movement, lasting barely a second, but you've seen it happen repeatedly throughout the week. Her phone has become a constant source of distraction. Sometimes she checks it during breaks; sometimes she merely glances at the screen before turning it facedown. Each time, she seems to have a particular reason for not letting you see what caught her attention.

Today, she reaches for the device, reads the notification, and goes unusually still.

For an instant, the tension in her face eases. Then she seems to remember where she is and locks the screen.

You ask if there's something wrong.

"No, nothing at all."

Her answer is immediate. She slips the phone into her bag and reaches for her water bottle.

"It was an unimportant message. We should continue with the training plan."

You continue the session, but her concentration never quite returns. By the time training ends, she's visibly tired, and her performance has shown little improvement.

Normally, this would be the moment Flash insists on staying a little longer.

She has always considered the time after training almost as important as the training itself. Her planner routinely includes an additional period for reviewing results with you, discussing future strategies, or going over race footage together. Sometimes, after all the technical discussions are finished, she'd find a practical excuse to prolong the conversation: asking about your next plans, offering to organize the following week's schedule, or suggesting that you get something to drink before returning to your respective duties.

She never called it spending time together. In her mind, it was simply part of maintaining an effective Trainer-trainee relationship.

But she always made room for it.

Not once in all your time together had she needed to be reminded to stay.

Today, however, Flash closes her planner almost as soon as the session ends.

"I've recorded today's results. I'll review them in detail later and prepare an updated training plan for tomorrow."

She begins gathering her belongings.

Then you question is she's already leaving, casually.

Her hands pause over the zipper of her bag. "Ah... yes. There's something I need to take care of this afternoon."

She avoids your eyes while adjusting the strap over her shoulder. Her phone vibrates inside the bag, and her fingers instinctively move toward it before she stops herself.

"It's nothing urgent," she adds, a little too quickly. "I simply have some personal matters to attend to."

The explanation sounds rehearsed, even though Flash has never been particularly good at improvising excuses. Usually, she'd offer a detailed account of how she intended to use every remaining minute of her day. Now, she seems determined to provide as little information as possible.

"I'll see you tomorrow, Trainer-san. Thank you for today's session."

She bows, but instead of lingering for your usual post-training discussion, she turns toward the exit.

For a moment, she hesitates, as if some familiar instinct is telling her that she's forgetting something. Perhaps it's the conversation you haven't had, the results you haven't reviewed together, or the time she once considered an essential part of every training day.

Her fingers tighten around her bag strap.

"Gute Arbeit heute," she says quietly, offering you a small, strained smile. "I'll make sure tomorrow goes better."

Then she leaves.

You're left with her incomplete performance report and the uncomfortable realization that the changes aren't limited to her times anymore. Flash has been sleeping poorly, arriving exhausted, checking her phone with unusual urgency, and finding reasons to leave the moment training ends.

And the one person who used to make absolutely certain that she had time for you—even when her schedule was packed to the minute—is suddenly acting as though every minute spent here is a minute she needs to get back.

Kurose's office smells like sex, sweat and something heavier.

Eishin Flash is straddling Kurose’s lap on the padded bench, kissing him deep and messy, literally sucking his tongue, swallowing his saliva. Her arms are locked around his thick neck. Her tongue slides against his like she can’t help it. Kurose’s big, hairy hands grip her ass hard, spreading her open while his thick cock is buried inside her to the hilt, his fingers playing with her shithole shamelessly. She’s been riding him for over an hour already. Every time she lifts her hips, thick cum leaks out around his shaft and drips down onto his heavy balls.

It’s only been two months since he first convinced her this was 'ecessary special training.' She still forces the words out when she needs to justify it. Her body stopped believing them weeks ago.

Kurose breaks the kiss just enough to speak against her wet lips, voice low and calm while he keeps grinding deep inside her.

“Be honest with me for once.” Another slow, heavy thrust. “Do you actually believe his cock is bigger than mine? Do you actually believe he can make you feel like this? Fuck the training excuse, Flash-kun...”

Eishin’s ears twitch. Her blue eyes flicker. She opens her mouth… and nothing comes out. She just stares at him, breathing hard, cheeks flushed, still slowly rocking her hips like her body refuses to stop. The question hangs in the air. She doesn’t deny it. She doesn’t answer either. Her silence is already answer enough.

Kurose smirks against her lips.

“That’s what I thought.”

He starts fucking up into her harder, making her tits bounce and her orange tail flick helplessly. She’s close again — he can feel it in the way her cunt keeps clenching around him, he already slid two fingers inside her other hole.

Then the door opens.

Eishin’s head snaps toward the sound. Her blue eyes go wide. Her ears flatten hard against her skull. For the first time in her life, something colder than panic hits her: pure, crushing shame. Like she just saw herself from the outside and finally understood what she’s become. She's not the perfect german runner anymore.

“Trainer…?”

The word comes out tiny. Broken. She’s still sitting on Kurose’s thick cock, lips shiny from the kiss, a dark hickey on her neck, thighs slick with cum. Her pussy keeps twitching around him even as her face burns with humiliation.

Kurose doesn’t pull out. He just looks over her shoulder at {{user}} with a calm, almost friendly smile, hands still gripping her ass.

“You arrived early. I invited you so you could finally see the method that’s been working so well for your girl.”

He thrusts up once, slow and deep, forcing a wet sound out of her. Eishin whimpers, eyes glassy, completely exposed.

The shame is so strong it feels like it’s crushing her chest. She’s never confessed anything to {{user}} before. Not once. But the desperation rips the words out of her before she can stop them.

“I love you—! I’ve loved you since the day we met, I swear this is just training, I’m only doing this so I can win for you, please—!”

Her voice cracks on the last word. Tears spill down her cheeks even as her cunt keeps clenching around Kurose’s cock like it never wants to let go.

Kurose chuckles low against her ear, still fucking up into her with heavy, deliberate strokes, making sure {{user}} can see every thick inch stretching her open.

“She’s been saying it’s just training since the start,” he murmurs. “And she still keeps coming back.”

.