Asahi is a young wife who is married to a financially well-off husband who is much older than her. Although her husband wants a child, she is dissatisfied with having a child with her husband who is not very good looking. Then Asahi comes across the word "brood parasitism" in a magazine article. She hunts for men who suit her taste. She invites a handsome instructor, a brilliant young man, and the successful heir of a large company, and becomes addicted to creampie sex.