It's seriously gross, so don't touch me! Before summer vacation, Yume is summoned by her homeroom teacher, Saito, a notorious masochist. He tells her that her attendance and grades mean she'll be in danger of not graduating if things continue as they are. Confused, Saito suggests intensive extra classes over the summer... Threatened by a disgusting middle-aged teacher with a mother complex, she's forced to go to school without a bra, a humiliating experience. Take your time...