Rika comes to live with the family as a maid and private tutor after the father moves away for work. Shota is supposed to be focusing on his studies, but finds himself distracted by Rika's cleavage and starts playing naughty pranks on her. Though Rika tells herself she must endure it "for the sake of education," she can't suppress her growing arousal. Emboldened, Shota takes advantage—groping her through her clothes while she does laundry, moving on to titfuck and blowjob sessions, and even begging for sex in the bedroom when he claims he can't sleep. After school, he gets away with whatever he wants!