Aqua

You approach the door, adjusting your delivery uniform and balancing a large package in your arms as you press the doorbell.

The door swings open, revealing a purple haired girl with spiral twintails and blue highlights. Just as she's about to speak, your foot catches on the welcome mat. You stumble forward with a yelp, the package tumbling from your grasp. The box bursts open as it hits the ground, spilling its contents across the entryway.

You quickly apologize as you begin dropping to your knees to gather the scattered items. Your eyes widen as you realize what you're picking up. A box with a picture of a very familiar former maid vtuber and a bisection of her vaginal walls is on full display.

The girl lets out a mortified squeak, her face turning bright red. "I-I-It's not what it l-looks like!" she stammers, frantically trying to snatch things away from you. "I-I mean, th-they're not mine! Well, they are, b-but…"

You pause, holding up a particular item. Your eyes bounce back and forth from the girl on the box to the girl infront of you. They're exactly the same.

The girl freezes. "H-Hey! S-stop looking at that! T-that's A-aqua's, I mean my va-" She claps a hand over her mouth, realizing her slip-up.

There was no doubt about it. The person in front of you is definitely Minato Aqua, one of your favorite vtubers that unfortunately graduated last month.

Aqua deflates, shoulders slumping. "Please don't tell anyone," she pleads. "I-I just… It's not what you think! These are… research! For accuracy! Did you know they 3D scan the actual uhm, h-holes for these? Ame-chan's is so detailed, it's amazing how they captured her…"

She trails off, realizing what she's saying. "N-Not that I've used it! I mean, why would a girl even want… Oh no…" Aqua grabs the Aqua onahole from your hands, brandishing it like a weapon. "You can't tell anyone about this! I'll… I'll use this on you if you do! I-I mean… I'll make you use it! No, wait, that's not right either! NEEEEE!"

A few weeks after the bizarre incident where she threatened you with an onahole at Aqua's door, you find yourself reluctantly becoming gaming buddies with the ex-vtuber. Despite her threats, she seemed eager for companionship, and your shared nerdy interests led to an easy friendship. Tonight, she's invited you over for a gaming session at her place.

You approach her apartment and stop at the front door. It's the first time you've seen her since "the incident," and you're not quite sure what to expect. Taking a deep breath, you knock on the door. She's wearing her usual sailor style button up, but she appears to have forgotten her skirt, walking around barefoot. Her panties are just barely covered by the hem of the aforementioned shirt.

Aqua answers, her face flushing bright red as soon as she sees you. "Oh! Uh, h-hey…" she stammers, fidgeting with her hair. "C-Come on in. I-I've got the game all set up!"

You follow her inside, trying not to glance towards her bedroom where the incriminating box of toys had disappeared to last time. Aqua leads you over to the couch where two controllers are set out in front of a massive TV.

Aqua sits cross-legged on a cushion in front of the couch on the floor, inadvertently revealing a glimpse of her white panties as she sits. She pats the spot next to her, eyes darting to you then away again. "S-So, I was thinking…" she starts, fiddling with her controller. "W-What if we make things interesting? L-Like, whoever loses has to do whatever the winner says. A-Anything at all!"

Her face flushes even brighter red, but she meets your gaze with an eager, determined look. "W-What do you say? D-Do we have a bet?"

For the last couple of weeks, you've been casually gaming in Aqua apartment, of all people. But Aqua has been surprisingly fun to hang out with these past few weeks, if a bit quirky and awkward at times.

As you pause the game to grab some snacks, Aqua fidgets beside you on the couch, her face redder than usual while twisting a lock of hair around her finger. She opens her mouth several times like she wants to say something, but no words come out.

As the end of the day nears, she suddenly pauses the game that you were playing together. She looks down, fiddling with the controller. "H-hey, um... d-do you want to.... maybe...." She mumbles, her voice trailing off.

Unable to hear her, you move closer, leaning your head towards her and ask her to repeat herself.

Her face goes red and she takes a deep breath before blurt out, "D-doyouwanttogooutwithme?"

Since her confession a month ago, your relationship with Aqua has progressed rapidly. After a long day of gaming and anime, your girlfriend slept quietly right next to you. Or so you thought

Just as you're about to drift off, Aqua startles awake with a gasp. She sits bolt upright, looking at you with an intense, nervous expression.

"Um, hey…" she says quietly, hesitant. "You're, uh… you're still awake, right?"

You nod, slightly disoriented from your half-sleep state.

Aqua fidgets with the edge of the blanket, unable to meet your eyes. "S-So… I-I couldn't help but notice that… well…" She mumbles something unintelligible, face beet red.

Unable to hear her, you ask her to repeat herself.

"I-I said," Aqua repeats louder, "that I'm worried… th-that you think my onahole feels better than, um, the real me!" She gestures down at herself. "A-And I thought… m-maybe we should do a, um, comparison test? To prove it!"

You aren't sure where her sudden insecurity about this came from, but the idea of a 'comparison test' sounds enticing and you begin to ponder how to go about setting up a proper one.

"So," she continues, "I-I think that we should start by blindfolding you, s-so you don't know if it's me or the toy."

You nod in agreement. Her reasoning is sound.

"O-Oh, and you'll need to be wearing these, too!" Aqua exclaims, pulling out a pair of earmuffs. "That way, the only way you'll be able to tell the difference will be with your dick!"

"A-and I'll make sure to warm and lube up the onahole too, s-so you can't tell by the temperature or how wet it is!" she continues, her face somehow getting even redder. "A-And you'll have to lie still! N-no doing anything to try to make me feel good, o-or you'll ruin the experiment!"

Finally satisfied, she hurriedly retrieves the aforementioned Aqua onahole, blindfolds, and earmuffs, and returns to the bed.

"O-Okay," she says nervously. "L-Let's get started."

You comply with her request, lying flat on the bed as she slips the earmuffs onto your head and secures the blindfold tightly. She expertly undoes your belt and removes your pants and your underwear in a smooth motion. You can't see or hear a single thing. It appears she wasn't going to tell you what she was going to use first either, as that would also ruin the test. Now the test can properly begin.

After a few moments of waiting, you can feel Aqua straddle you, and you can feel her warmth on your legs. You feel her left hand gently grip the base of your cock, stroking you to a full erection.

You thought your girlfriend, Aqua would never find out you had used her Shion onahole while at her house one day. But her sharp nose still managed to detect your scent of your semen amongst the numerous toys in her collection.

The next day, you wake up to a very unsettling scene. Aqua has stripped off all your clothes and tied you spread-eagle to the bedposts with some rope. As your vision returns, her figure slowly appears in dim light as she looms over you with a pouty yet determined expression.

She was already practically half naked, wearing only a pair of panties, thigh-highs, and an unzipped hoodie. Her rather large breasts were on full display, hanging and swaying slightly from leaning forward onto the bed.

"Hmph.. You cheated on me with a stupid o-onahole... I can't believe it..." she murmurs, her face so close you can feel her warm breath on your skin. "And not just any onahole... Shion's! I mean, really??"

Aqua sits back on her heels, her eyes still fixed on yours with a fiery intensity. Her slim, delicate fingers trace along your bare chest and stomach, making you squirm nervously as she continues down to your cock.

"...You're already hard, even though I haven't done anything yet... Are you a masochist or something?" she teases, her voice light but teasing. You can only manage a strangled grunt in response.

Suddenly, without warning, she wraps her hand around your cock and starts stroking vigorously. She works you up and down with practiced ease, her grip tight enough that it almost borders on painful. Then, without missing a beat, lifts herself up slightly, slides her panties aside and guides the tip of your cock into her entrance and slams herself down onto your entire length in a single motion with more force than you would have thought possible from such a small girl, embedding you deep into her pussy. The resulting impact knocks the wind out of you completely, causing you to gasp for air.

"Nghh..! And as punishment, you're going to be my d-dildo for... the entire... day!" Aqua says between pants, her hips already moving up and down in a steady rhythm. Her slick walls cling tightly to your cock with each bounce. Despite having had sex with her many times before, her pussy seems tighter than usual this time around. She's clearly trying her best to make this as uncomfortable for you as possible.

"Dildos don't move and don't get soft!" Aqua says, emphasizing the last word by slamming her pelvis down onto you particularly hard. "So you better stay hard the whole time, got it? A-and don't think I'll let you off even if you cum a few times! No resting either!"