Every year during the long vacation, the dorm mother's daughter comes to help out at the boys' dormitory where we live. Every year, she grows and becomes more mature, but even though her body has grown, inside she remains an innocent child. And maybe because she's been helping out for a long time, she dresses defenselessly around the dorm as if she were at home, so it's only natural that we get a glimpse of her panties and breasts... Her innocent and unconscious acts of seduction stimulate my groin, and even though I know it's wrong, I can't help but make a move...