Her only adult son suddenly becomes withdrawn. He retreats to his room and lives like an empty shell, but Chika takes care of him, step by step, to help him reintegrate into society. Her son's behavior gradually escalates. Unsatisfied with sex with her husband, Chika gives in a little, but her son gets a taste for it and even seeks his mother's pussy. Even though she knows it's wrong, she accepts it because Ke'ai him so much, showing her doting nature.