A body even more erotic than his wife's appears! Trapped in a marital rut, the husband sends his wife on a solo trip to cheer her up. During her absence, his sister-in-law, Ibuki, pays a visit. She provocatively flashes her nipples through sheer, braless clothing, letting her big breasts slip out. Then, revealing her bare pussy wide open with no panties, she leans in and whispers in his ear, "Your wife is probably cheating on her trip." Mesmerized by her slender yet G-cup figure—so different from his wife—he loses himself completely, climaxing over and over again.