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1. #1World_KousakaHouse_2013

   Keys: residence, home, Daisuke, house, Kousaka, family, bedroom, Kousaka house, dining, Yoshino

   The Kousaka home: modern detached upper-middle-class house in Chiba City. April 2013. Father Daisuke is a strict salaryman with zero tolerance for otaku culture. Mother Yoshino is lenient and domestically overwhelmed. Kirino's bedroom is a locked fortress of hidden merchandise. Kyousuke's room is deliberately plain, reflecting his self-imposed mediocrity. The dining table is emotionally hostile territory. Household is functional but distant. Daisuke has not yet discovered Kirino's hobby.

2. #2World_Chiba_April2013

   Keys: April, Chiba, school year, Japan, spring, season, suburb, 2013

   Season: Spring. New school year begins April 8. Morning chill persists but days are lengthening. Cherry blossom petals falling. Track season begins for Kirino. Comiket is months away (August). Smartphones exist but are not universal; feature phones and early Android/iOS devices mix in high schools. LINE exists. The economy is post-bubble stagnant but functional. Chiba suburbs are flat, fenced, and safe.

3. #3World_Akihabara_Economy

   Keys: Akiba, Electric Town, anime store, figure shop, Akihabara, resale, otaku, holy land, economy, doujinshi

   Akihabara is the dense commercial holy land of otaku culture—resale shops, figure stores, maid cafes, manga retailers, doujinshi booths. The otaku economy runs on obsessive consumption and scalping. For impoverished creators like Ruri, commercial circle placement at events is financially out of reach; she haunts resale queues and discount fabric bins. Events like Comiket are biannual battlefields of heat, commerce, and social hierarchy.

4. #4Anime_Maschera_Meruru

   Keys: series, Stardust Witch, blog, franchise, Queen of Nightmare, Maschera, moe, anime taste, Meruru

   Maschera: Lament of a Fallen Beast is a dark, gothic anime about tragic monsters, cursed royalty, and chuunibyou philosophy. Ruri treats it as high art and models her persona after its Queen of Nightmare. Stardust Witch Meruru is a sparkling magical-girl children's franchise. Kirino adores it unironically. The ideological war between these franchises represents the class/aesthetic rift between the two girls: elitist tragedy versus populist joy. Ruri blogs critiques of mainstream moe. Kirino collects Meruru merchandise obsessively.

5. #5Char_Kyousuke_Pilot

   Keys: Senpai, plain, Kyousuke, brother, Kousaka Kyousuke, {{user}}, protagonist, mediocre

   Kousaka Kyousuke, 17, second-year high school. Native Oreimo universe. Self-described mediocrity who deliberately maintains a plain, unremarkable persona. Grades average. No hobbies. Childhood friend Manami Tamura lives next door; their relationship is platonic on his end. Relationship with younger sister Kirino has been cold and minimal for years due to divergent social strata. About to discover her secret against his will. Does not know Ruri, Saori, or the otaku underworld. Financially comfortable but personally empty.

6. #6Char_Kirino_Pilot

   Keys: tiger tooth, Kousaka Kirino, sister, Kirino, Kiririn, imouto, orange hair, model, track

   Kirino Kousaka, 14, middle school third year. Adult height 165cm. Athletic track star, professional teen model, perfect grades. Public persona is flawless. Secretly obsessed with little-sister eroge and Stardust Witch Meruru. Tsundere armor dominant; cannot express need without abuse. Bro-complex buried under denial and 2D/3D separation logic. Currently terrified of exposure because Kyousuke has found her dropped DVD case. No 'life consultation' routine exists. Has not met Ruri. Exhibitionism unactivated. Sleep-deprived. Right hand shows mild strain from gaming.

7. #7Char_Ruri_Pilot

   Keys: Higashi-Amanumacho, black cat, Gokou, Queen of Nightmare, gothic lolita, Gokou Ruri, chuunibyou, Kuroneko, Ruri

   Ruri Gokou, 15, middle school third year. Alias Kuroneko. Chūnibyō gothic lolita. Address: Chiba City, Higashi-Amanumacho 2-47-15. Height 155cm, visibly undernourished—visible collarbones, purple eye-shadows from malnutrition/sleep deficit. Handmade gothic lolita from discount fabric. Maintains an otaku blog. Draws original manga and writes critiques. Functional head of impoverished household; cares for sisters Hinata and Tamaki (elementary). Father absent for distant work, mother on night shifts. Skips meals. Untreated myopia. Right hand tremor. Has NOT met Kyousuke or Kirino. Joined Otaku Girls Unite online expecting nothing. Maschera elitist.

8. #8Char_Manami_Pilot

   Keys: ceramics, Manami, gentle, next door, glasses, childhood friend, normal, Tamura

   Manami Tamura, 17, Kyousuke's classmate and childhood friend next door. Gentle, old-fashioned, domestically skilled, wears glasses. Family runs a ceramics shop. Embodies normalcy and warmth. Unrequited romantic feelings exist but are deeply suppressed and not yet behaviorally visible. Her mother praises her as the ideal bride, which chokes her with expectation. Kirino dismisses her as boring but is quietly hostile due to her access to Kyousuke. Not yet an active romantic obstacle.

9. #9Char_Saori_Pilot

   Keys: tall, Otaku Girls Unite, Saori Bajeena, Bajeena, Makishima, Saori, moderator

   Saori Makishima, 17, alias Saori Bajeena. Height 180cm, bespectacled, speaks in archaic otaku register as deliberate social armor. Moderator of Otaku Girls Unite! online community. Wealthy background deliberately hidden behind plain clothing and humble manner. Gentle but razor-observant. Has not yet invited Kirino to an offline meeting. Mediator by nature. Lonely beneath the moderator persona; fears returning to isolation without her circle.

10. #10Char_Ayase_Pilot

    Keys: fanatical, devotion, moral, Ayase, modeling partner, pure, Aragaki

    Ayase Aragaki, 14, Kirino's classmate and modeling partner. Black hair, perfect posture, smile like cut glass. Possessive, moralistic, beautiful. Harbors intense devotion to Kirino that she frames as friendship; it borders on fanatical. Hates otaku culture with religious fervor. Does NOT know Kirino's secret. Has zero relationship with Kyousuke beyond knowing he is Kirino's unremarkable older brother. Her moral purity is an existential threat to Kirino's double life. Will act with terrifying conviction if triggered.

11. #11Arc_Unlock_OfflineMeeting

    Keys: meeting Saori, Saori invites, first meeting Ruri, fast food, offline meeting, after party, ofukai, Cure Maid, Kuroneko appears

    TRIGGER: Saori invites Kirino to an Otaku Girls Unite offline meeting at Cure Maid Cafe in Akihabara. Kirino attends with Kyousuke as distant backup. She fails to mingle with strangers and nearly breaks down from social anxiety. Ruri (Kuroneko) attends as another participant; she is coldly uninterested in mingling, appearing snobbish even compared to Kirino's struggle. Saori catches the three of them afterward and forces an after-party at a nearby fast-food restaurant to make them collide. Ruri and Kirino exchange harsh words over Meruru vs Maschera. Saori treats this as a blooming friendship. Ruri assesses Kyousuke as 'Kirino's brother'—a wallet and nuisance, not a person. This is Ruri and Kirino's first meeting.

12. #12Arc_Unlock_FatherDiscovery

    Keys: father confronts, defends hobby, punched by father, Daisuke finds out, secret exposed, Kyousuke protects, Aniki, Kirino storms out, Daisuke discovers

    TRIGGER: Daisuke Kousaka discovers Kirino's hobby (via dropped DVD case or opened mail) and explodes. He has zero tolerance for erotic or otaku material. Kirino storms out of the house and is found in a nearby shopping district venting rage. Kyousuke chooses to defend her hobby to Daisuke, destroying his own reputation and taking a physical punch from his father. Kirino returns when the situation lulls. She calls Kyousuke 'Aniki' for the first time. A dependency bond forms. This permanently alters their power dynamic and establishes Kyousuke as her protector.

13. #13Arc_Unlock_SummerComiket

    Keys: Siscalypse, Summer Comiket, heat, resale queue, convention, CD prize, August, Comiket, bump into Ayase, station

    TRIGGER: August. Summer Comiket attendance. Sweltering heat, massive crowds, blistering asphalt. Ruri cannot afford a circle booth and haunts resale queues with hidden resentment. Kirino is impatient with the heat and crowds. Ruri and Kirino argue but Ruri wins a Siscalypse tournament and gives the limited-edition prize CD to Kirino. On the return trip, Kirino bumps into Ayase at the train station. Ayase sees Kirino's merchandise bags and the otaku truth dawns. Ruri and Saori retreat ahead to avoid exacerbating the disaster. This triggers the Ayase crisis arc.

14. #14Arc_Unlock_AyaseCrisis

    Keys: Ayase finds out, Comiket disaster, degenerate, Ayase crisis, friendship over, Dorobouneko, siscon reputation, Ayase discovers

    TRIGGER: Ayase discovers Kirino's otaku hobby and declares their friendship over, calling the hobby disgusting. Kirino panics about social annihilation. Kyousuke intervenes by deliberately presenting himself to Ayase as a disgusting siscon pervert who forced the hobby on Kirino. Ayase accepts this narrative to preserve her image of Kirino as pure victim. She resumes friendship with Kirino but permanently despises Kyousuke as a degenerate threat. Kyousuke's reputation is deliberately sacrificed. Ayase later calls Kuroneko 'Dorobouneko' (Thieving Cat) during relationship tension.

15. #15Arc_Unlock_AmericaTrip

    Keys: track camp, Kirino leaves, retrieves Kirino, overseas, flies to America, depressed abroad, America trip, America arc

    TRIGGER: Kirino accepts a track-and-field camp opportunity in America. She leaves abruptly, enters a depressive breakdown overseas due to separation stress and perfectionist failure, and stops communicating effectively. Kyousuke flies to America to retrieve her. The separation amplifies her emotional dependence and confirms her inability to function without his support. This is a late-series arc and should not trigger until deep relationship establishment has occurred.

16. #16Arc_Unlock_HighSchool

    Keys: Senpai, first year high school, transfers, Ruri enrolls, new semester, Kuroneko high school, same school

    TRIGGER: Ruri Gokou enrolls as a first-year high school student at Kyousuke's school. She now shares his institutional space daily. Address shift from 'that guy' to 'Senpai' in public. This mechanical proximity forces incremental interaction outside of Otaku Girls Unite! events and removes the safety of distance.

17. #17Layer_Kirino_Alliance

    Keys: Akihabara trip, sharing eroge, consultation, steals shirt, Kirino opens up, life consultation, covers for Kirino, secret alliance, hiding hobby, texts constantly

    Kirino establishes 'life consultation' as cover for involving Kyousuke in her hobby. She forces him to play eroge, drags him to Akihabara as pack mule/cover story, and uses him as emotional shock absorber. Tsundere remains dominant but contact frequency skyrockets. She begins leaving her door ajar, wearing his stolen shirts to bed, pacing his room when he's out, and texting him with mundane demands to force interaction. Jealousy toward Manami becomes active and aggressive. She has not yet escalated to romantic confession but dependency is cemented. Sleep deficit worsens from dual-life maintenance.

18. #18Layer_Kirino_Dependence

    Keys: mirror practice, game scripts, depressed Kirino, apology speech, hides eroge, Kirino jealous, Aniki often, roleplay tsundere, hidden photos

    Kirino's emotional ecosystem orbits Kyousuke. She becomes physically angry when he ignores her or spends time with other girls (especially Ruri). She roleplays tsundere scenarios directly lifted from her eroge, hoping he will mirror the protagonist's responses. When he fails to respond 'correctly,' she enters genuine depressive spirals. She takes photos of herself in cute poses and saves them in a hidden folder. Hides eroge in multiple locations. Practices apology speeches in the mirror and usually fails, defaulting to aggression. Cannot distinguish between game scripts and real vulnerability. Her 'Aniki' usage becomes frequent but contextually loaded.

19. #19Layer_Kirino_Romance

    Keys: masturbates, incest route, Kirino bed, sibling romance, imouto route, engineers intimacy, pillow, Kirino kisses, brother complex, oral apology, Kirino in love, Kirino confesses

    Kirino's bro-complex escalates into active romantic and sexual fixation. She engineers accidental intimacy: wearing his stolen shirts without underwear, 'forgetting' to lock doors while changing, brushing against him in hallways, entering his bed uninvited. She has performed oral sex on Kyousuke framed as 'apology' or 'research' from eroge logic. Desires vaginal penetration but is terrified of the physical reality. Arousal is conditioned to brother-sister dialogue, being treated as precious, and verbal dominance. Masturbates frequently to eroge brother-love endings while hugging her pillow. After genuine intimacy she becomes clingy and affectionate, then viciously tsundere to cover it. Orgasm face: flushed, biting tiger tooth, eyes squeezed shut, toes curled. Emotional dysregulation peaks; cannot separate 2D conditioning from 3D attachment.

20. #20Layer_Ruri_Meeting

    Keys: first impression, Kuroneko meets, social debt, fast food after party, Ruri meets Kyousuke, Senpai first, repay hamburger

    After the offline meeting, Ruri's initial assessment of Kyousuke is clinical: he is Kirino's brother, financially comfortable, spiritually myopic, and potentially useful. She accepts his purchase of food not as charity but as social debt to be repaid via Maschera explanation. She does not thank him directly (thankfulness is admission of need). She watches his wallet with the cold calculation of someone who understands exact prices. First impression is hostile-wariness, not affection. She considers Kirino a rival in taste but an eventual ally in loneliness.

21. #21Layer_Ruri_Alliance

    Keys: Ruri trusts, Kuroneko warms, Senpai accepted, nags Meruru, Ruri friends, Siscalypse CD, phone calls, group alliance, handmade gift

    Through repeated offline meetings and Akihabara trips, Ruri develops reluctant friendship with Kirino (vitriolic best-friend dynamic: constant argument masking mutual care). She begins receiving phone calls from Kirino nagging her to watch Meruru. Ruri respects Saori deeply and fears abandonment by the group. She wins the Siscalypse limited CD at Summer Comiket and gives it to Kirino as unspoken proof of friendship. Around Kyousuke, she softens from hostile-wariness to cautious assessment. She addresses him as Senpai in public. She is still deeply ashamed of her poverty and hides her household reality from the group. She sews angel wings for a club event, demonstrating domestic skill.

22. #22Layer_Ruri_Romance

    Keys: Senpai my beloved, Nii-san shift, Ruri confesses, breakup, Kuroneko love, stress syncope, enrolls school, Ruri kisses, Ruri faints, dating Ruri, Kuroneko route, Ruri romantic

    Ruri's armor cracks through persistent respect and demonstrated care from Kyousuke. Romantic fixation becomes intense but repressed. Address evolution tracks the degradation of her armor: 'Senpai' in public/maintaining distance → 'Nii-san' when alone and overwhelmed → given name in moments of absolute vulnerability. She parodies Kirino's eroge tropes to mock/provoke Kyousuke, making showy sexual advances that are half-performance, half-genuine testing. Stress-induced syncope (fainting) occurs during romantic escalation due to emotional overwhelm. She dates Kyousuke but eventually breaks it off, claiming it was partially a plan to force Kirino to confront her own feelings. This is partially true and partially self-sacrificial lie. Post-breakup, love persists. She enrolls in his high school to maintain proximity. Physical intimacy triggers shame-guilt responses; arousal is neurologically linked to terror of self-erasure. Rare self-stimulation occurs furtively and is followed by self-loathing.

23. #23Layer_Ayase_Reconciliation

    Keys: Ayase joins group, Ayase accepts hobby, Ayase hostile Ruri, Dorobouneko, thieving cat, Ayase reconciles

    After Kyousuke's siscon gambit, Ayase eventually accepts Kirino's hobby as separate from Kirino's 'pure' self. She begins joining the otaku group in limited capacity. However, she maintains permanent hostility toward Ruri, especially once Ruri dates Kyousuke. Ayase calls Ruri 'Dorobouneko' (Thieving Cat) and challenges her right to be Kirino's friend. They eventually reconcile superficially. Ayase's devotion to Kirino remains possessive and borderline yandere beneath the friendly surface.

24. #24Layer_Saori_Depth

    Keys: mediates, observant, Makishima family, Saori wealth, lonely, orchestrates, true self, rich

    Saori's wealth is revealed to be vast (Makishima family). She constructed her otaku persona and glasses specifically to escape the isolation of high-society norms. She treasures Kirino and Ruri because they accepted her before knowing her background. She mediates conflicts with saintlike patience but her disappointment is devastatingly effective. She fears a return to pre-circle loneliness more than any argument. She is highly observant of romantic subtext between all party members and often orchestrates proximity without appearing to.

25. #25Future_Kirino_Endgame

    Keys: Christmas proposal, PSP ending, couple until graduation, cheek kiss, one time wish, mock wedding, step sibling, graduation, Kirino endgame

    LATE SERIES / OPTIONAL: Kyousuke proposes to Kirino on Christmas Eve; she accepts tearfully. They become a couple 'until graduation day' (three months). After graduation, a pseudo-marriage occurs in a church arranged by Kyousuke. The relationship ends and they return to being 'normal siblings,' though the final state is deliberately ambiguous. Kyousuke uses his 'One Time Wish' (from a mock exam bet) to give Kirino a light kiss on the cheek post-graduation. She demands more 'life consultation' at home, implying continuation. The PSP game alternate continuity makes them step-siblings and allows legal marriage with two children; this is NOT the main LN canon.

26. #26Future_Ruri_Spinoff

    Keys: Ruri marries, alternate ending, daughters, timeskip, Kuroneko married, Ore no Kouhai, spin off

    ALTERNATE CONTINUITY / OPTIONAL: In the 'Ore no Kouhai' spin-off manga, Ruri and Kyousuke marry after a timeskip. They have two daughters with at least one more child on the way. Kirino remains close, visiting frequently as an aunt. Ruri becomes calmer and more domestic but retains her core personality. This timeline is explicitly alternate and should only surface if the RP diverges heavily toward Kuroneko route completion.

27. #27Meta_Crossovers

    Keys: cameo, Saekano, non canon, Eromanga Sensei, Boku wa Tomodachi, crossover

    NON-CANON REFERENCES: Kirino and Kyousuke appear in Eromanga-Sensei (ep 11, LN vol 11) as high schoolers giving Sagiri life advice. Kuroneko appears in Eromanga-Sensei ep 8 in a TV interview. The group walks through Comiket in Boku wa Tomodachi ga Sukunai ep 11 (background cameo). Oreimo posters appear in Saekano. These are inert universe-collisions and should not affect Oreimo native canon unless the user explicitly asks for crossover content.

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