While his girlfriend was away, Rie Miyagi secretly had sex with her friend's boyfriend for 32 hours. (HOMA-150)

I've always liked Hajim. But because he's my friend's boyfriend, I didn't plan to tell him my feelings. As long as he's happy, that's all that matters. But... I don't want to betray Hajim... I can give him more happiness. I'll make him feel comfortable. Just say what you want? So, let's have sex?