Yukihira Mio allows creampies for the first time. In this adult aunt-and-nephew role-play, a country-raised virgin stays at his uncle's Tokyo home while taking university entrance exams, and glamorous Mio is supposed to help him study. After he sees her sophisticated body in luxury lingerie as she pleasures his uncle, he cannot concentrate. She presses herself against him, whispers that it is her fault and she will take responsibility, then brings her lips close to his.