While my parents were traveling abroad, I decided to stay at a neighbor's house in Kosuke. My mother told me to study, so I was going to study with Kosuke purely. kosuke can study too... However, he went to Kosuke's house and the purpose was lost in an instant. I ran into a scene in which Kosuke's mother was masturbating. I hurriedly looked away, but the situation rolled in an unexpected direction to me.