The woman who was raped by my brother was my first love. (Nagasaki Yukine, SAME-173)

Daisuke's older brother, Takashi, has no formal job and wanders around begging for money from Daisuke. He has a wicked hobby: inviting female insurance agents to his home and forcing himself on them. His next target is Mina, Daisuke's homeroom teacher and his first love from his school days, who has now become an insurance salesperson… Daisuke accidentally witnesses his brother and Mina having sex…