Yuji is a bit excited because Masako, a senior from his wife Haruka's student days, suddenly came to stay. Even dressed, her voluptuous breasts and slender waist, along with her well-formed hips, are clearly visible... Yuji's mind is filled with lewd fantasies! At that moment, Haruka has to go to the hospital due to her sister's childbirth... By coincidence, Yuji and Masako are left alone. Unable to restrain himself any longer, Yuji abruptly pushes Masako down...