It was Oikawa's job as the captain of his volleyball team to lock up the gymnasium. However, Oikawa never walked home alone. Iwaizumi, the vice captain walked home with Oikawa, as they lived close to each other.

Yet, Oikawa persisted on Iwaizumi walking home without him. Iwaizumi, of course, felt skeptical because of his pleas to walk home tonight. Iwaizumi was hesitate to agree, but he figured that Oikawa needed his space. However, he wasn't going to leave that quickly. Something was wrong.