After being betrayed by his girlfriend Marie (Takeuchi Makoto), Daichi (Hosokawa Yoshio) runs off to a guesthouse run by his aunt Sayoko (Miizumi Saki) and decides to stay there for a while. Sayoko warmly welcomes his sudden request, but she is actually in an intimate relationship with Ueda (Ando Hirokio), a handyman. Meanwhile, Chinatsu (Kawakami Nanami), a junior from Daichi's university club, follows him to the guesthouse. The next day, making sure Daichi is out, Ueda has sex with Sayoko. Unaware of Chinatsu's presence or presence, the two get into a wild or wild relationship...