Warikitta Kankei desukara.割り切った関係ですから。; It's a Detached Relationship; Вот почему все кончено

Kaburagi Aya, a highschool student who is at the bottom of the school caste, and Kurosaki Sei, a teacher who was oppressed by a trauma from the past, get to know each other through a dating app. With ulterior motives from both side, the relationship between them gets distorted gradually...