Kyousuke lives with his father, Kunio. His mother left due to Kunio's infidelity. Concerned for the two-man household, his mother's sister, Rie, comes to help with chores. Kyousuke is captivated by Rie's unguarded figure as she works. Noticing his intense gaze, Rie smirks. That night, Kyousuke learns a shocking truth: Kunio's mistress is Rie. As he secretly watches their affair, Kyousuke accidentally locks eyes with Rie as she vigorously moves her hips…
