College student Kameda has finally gotten his first girlfriend. Despite his introverted personality, Kameda mustered the courage to confess his feelings and succeeded. His partner, Suzumo, was supposed to be a quiet and innocent girl... or so he thought. On the day Kameda visited her home for the first time, Suzumo started having sex with a neighbor right in front of him as if it were the most natural thing in the world. Shocked by the scene, Kameda has since been manipulated by the promiscuous and unchaste Suzumo...
