Father's remarriage partner Saki. His son Atsushi was suspicious of his young and beautiful mother-in-law. "Why is this woman (human) my father ...". And the bad premonition is right. One day, Atsushi happens to witness Saki's affair. Atsushi, who was usually sweaty and had a bewitching charm to Saki doing household chores, was angry at betraying her father and her feelings for Saki were mixed up, and she kept feelings that she was neither angry nor lustful. Attacks Saki ...