His father remarried Saki. His son Atsushi was Kokoro of his beautiful young stepmother. "Why would a woman like this be with my father..." And his bad premonition turned out to be true. One day, Atsushi happened to witness Saki cheating on him. He felt a seductive charm in Saki, who usually worked hard doing housework while covered in sweat. His anger at her for betraying his father mixed with his feelings for Saki, and with feelings that were neither anger nor lust, he attacked Saki...