Mitsuo Yokoyama, who grew up with a strict father, was haunted by strange dreams of sexual intercourse almost every night. Mitsuo's overflowing desire for sex, which reached his age, does not stop, and he even lusts for Satomi, who comes and goes in and out of the Yokoyama family like family. One day, Etsuko Mamiya, an older woman who harbors the light of dangerous desire in her eyes, appears in front of Mitsuo.