I live with my girlfriend in Tokyo. During the winter break, her younger sister Hikari, who is a student, came to stay at our place. One day, I encountered Hikari's bra-less and unguarded figure. Since I had been sexless, I couldn't calm down my erection, tried to grope her breasts and assault her, but instead was seduced by Hikari, leading us to repeat the act of internal ejaculation.
