The stepdaughter 'Aoi' cannot gain recognition as a mother from her husband's children. Towards the brother 'Hikaru' who always shows disgust, the younger brother 'Nobuo' gradually starts to care for her. However, Aoi lets her guard down with Nobuo and one day they become involved in a romantic relationship... But in reality, this was a trap set up by the brothers from the beginning. Aoi's days as a 'submissive stepmother' begin...
