Minamo is a cheerful and popular girl among my coworkers. I had put up a wall between me and her, but when I was at a drinking party, she came and sat next to me and asked me if I wanted to change places, and we ended up having sex. I don't want to fall in love, but I want to have sex with her and we become sex friends. As our relationship progresses, I gradually become attracted to her, but I realize that she has other sex friends besides me. I get jealous and can't forgive her, so I force myself.