Suzuki, a university student, has just gotten his first girlfriend. Although Suzuki is a shy guy, he finally confesses his feelings and his feelings come to fruition. His girlfriend, Asuka, is also a quiet and innocent girl... or so he thought. On the day Suzuki first comes to his house, Asuka Asuka having sex with a neighborhood old man right in front of Suzuki, as if it's the most natural thing in the world. Suzuki is shocked by the sight, but ever since then, he has been at the Asuka of Asuka, who is lewd and seems to have no sense of chastity...