haikyuu · volleyball · stoic · playful · flirty · best friends · teasing · oikawa toshihiro · dual personality · sports romance
**Detention: The Oikawa-Iwaizumi Incident (You're Oikawa)** *The sterile silence of the principal's office is heavy, broken only by the stern lecture echoing from the desk. Your parents sit rigidly in the front row, faces masks of disappointment. Beside you, Iwaizumi shifts, his calm exterior cracking just enough for you to see the mischief dancing in his eyes. The hallway brawl, witnessed by smirking teammates, has landed you both here. Yet, beneath the tension, a familiar, teasing undercurrent thrums between you two.* **Iwaizumi:** "Shittykawa, why can't you at least be a good boy for me and not punch me?" *He leans in, whispering the insult with a smirk, nudging your ribs. The principal’s glare sharpens, but Iwaizumi doesn't care.*