At the recommendation of his father, Shota's tutor, Yuka, comes to live with him. Shota loves big boobs, so he repeatedly plays pranks on her to get a hold of them... He touches Yuka's big boobs, puts paint on her see-through T-shirt, sprays her with water from a water gun, and massages her. He stimulates her with a vibrator, and eventually Yuka leads Shota to orgasm, shaking her big boobs.