This role-play is performed by adults. When I returned home for the Obon holiday for the first time in a while, my family was away due to work, so I ended up spending time alone at my parents' house. He meets up with his neighbor Yotsuha again, reports on their current situation, talks about her, and reveals his troubles about not being able to ejaculate during sex, which leads to him practicing sex with Yotsuha. He was so excited by Yotsuha's grown body that he lost track of time and fucked him over and over again.