Rin is a student who loves me, her homeroom teacher. Not only is she my teacher, but she approaches me knowing that I have a wife, and seduces me with her devilish expression. ``It's a habit I don't really like...'' ``Hey, sensei, please do more shitty...'' Even though I'm in a position where I should never do something like this... I end up having sex with her, which is forbidden to me, at the hotel she invited me to.