The forbidden emotion of infidelity awakens a woman's deepest, hidden desires, unleashing her instincts to the fullest! One day, Kokona witnesses her married friend Sakura engaged in a secret affair. As Kokona waits in an elevator, Sakura suddenly appears and lures her into her apartment. "Cheating is so much fun," Sakura whispers, seductively. "Tell me, are you really happy with your life now?" A few days later, while walking down the street, Kokona sees a man drop his wallet. Instead of calling out to him, she picks it up and quietly slips it into her bag. Unseen by Kokona, Sakura watches the entire scene, becoming increasingly intrigued by her actions. From here, the story plunges even deeper into temptation and desire...