Sakura, a mother with a college-aged son, finds some pornographic books in her son's room and becomes worried as she learns about her son's growth... One morning, when she goes to wake her son up, he has a morning erection! Seeing this, the mother becomes worried that her son will fail in relationships with women because of his lower body, so she secretly releases his pent-up sexual poison without him realizing, but she can't forget that young cock and goes back to her son's room...