Kimura Ji has lived with his mother Keiko for many years, but since deciding to marry Saito Kaoru, he has invited her to his home, and the three of them live together. However, Ji and Keiko have a secret they can't tell anyone……Kuzuryu Shin. He is Ji's biological father, Keiko's husband, and a criminal who received a twenty-year prison sentence for serial sexual assault. Just as Ji is about to get married, his worst possible father has returned.
