Masao's father, Ginji, decides to remarry when Masao gets a job. The person he was introduced to, without knowing anything about, turned out to be Misora, his private tutor from his days at ○ School. Masao, who was secretly in love with her, was unable to bless their marriage, saying, ``I can't accept that Misora-san is my girlfriend's mother!'' Misora is friendly towards her girlfriend Masao, who consoles herself by fantasizing about Misora's lewd behavior every night. One day, finally