Ryo moves into an apartment in Tokyo with the goal of becoming a musician. One day, when Mako, who lives on the floor below, points out the loud noise of his guitar, Ryo panics, falls, and hurts his wrist. Worried about him, Mako offers to take care of him... However, Ryo becomes aroused by the beautiful Mako and pushes her down. Ryo gives up on his dream and tries to leave the room, but Mako promises to be his lover for one night to motivate him once more...