Warikitta Kankei Desukara.

Briefly about Warikitta Kankei Desukara. manga:

Kaburagi Aya, a highschool student who doesn't feel fit in with her highschool life, and Kurosaki Sei, a teacher who was oppressed by the trauma from the past, knowing each other by matching App. With ulterior motives from both side, the relationship between them has been distorted gradually...