After her husband Shinsuke failed in his business, Ichika came to the Kuroki family home, which has a long tradition and history. At the family home, her stern father-in-law Ryoi greeted Ichika with cold eyes. This was because the man Ichika had dated in the past, Gaku, had come to the Kuroki house demanding money. Then, to get rid of Gaku once and for all, Ichika gave him money and even allowed him to use her body. However, upon learning of this, her father-in-law began a humiliating training regimen for Ichika, who had betrayed his son.
