The Usui couple finds themselves living with Kenji, Kenji's brother-in-law, who has been laid off and returned to his parents' home. Seeing Kenji drifting aimlessly, unable to hold down a job, his wife, Satomi, offers him sympathetic support and advice. However, her kindness only exacerbates his feelings of inferiority… Driven by surging urges, Kenji waits for a moment when Satomi is alone and attempts to seduce her. Caught off guard, Satomi finds herself swept away by her sexual desires…