SAME-173 The person my brother did it to was my first love. Nagasaki Yukine.

Taisuke's older brother, Takashi, didn't have a steady job and would often extort money from Taisuke while living aimlessly. Such a scoundrel had a perverse hobby: summoning female insurance agents to his home and forcibly having sex with them. Takashi's next target was none other than Taisuke's homeroom teacher and first love from his student days, Mina, who had become an insurance lady… Taisuke happened to witness his brother and Mina having sex…