Yūji Yagami is a high school student with an unusual problem. Yūji has developed a crush ob his mother, Nomi, who is abnormally youthful in both her looks and mannerisms. Nomi however, is oblivious to Yūji's Oedipus complex and unknowingly tempts him with her overly-passionate displays of affections to both her husband and son. The situation is further complicated when Yūji receives a love letter from someone else on Valentine's Day.

Kazuki Yao
Yagami Yuuji

Ryo Horikawa
Futamura

Mitsuo Iwata
Ichigaya Kazuki

Maria Kawamura
Ikari Mayuki
Hiroyuki Satou
Miyake

Hiromi Tsuru
Nanase Mitsuko

Chieko Honda
Yagami Nomi

Norio Wakamoto
Yagami Youji

Akira Kamiya
Yokkaichi Akira
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