"When an ordinary housewife casts off her mask, she falls into pure pleasure..." Yoko (Saeka Hinata) lives a mundane and boring life. Though she feels guilty toward her husband, she cannot break free from her affair with Tasaki. Her husband trusts her completely. Rather than falling for Tasaki himself, Yoko becomes more proactive in their relationship to fill the void in her heart and to assert her presence as a woman.