I've been single for 20 years and was a loner in the university lab. Amagumi-senpai is the one who talked to me. I, who have no immunity to women, immediately fell for her when she was kind to me. But she has a boyfriend, so all I can do is watch… Amidst all that, I had a turning point. A senior who had finished job hunting invited me out for drinks, and we had sex that night. I thought it was just a one-time thing, but the senior said, 'Being fuck buddies is fine,' so from that day on, we became fuck buddies.
