Aki decides to marry someone who has a stepchild. She suddenly becomes worried about being her mother, but she is trying her best for her precious son. On the other hand, Akihiro, her stepdaughter, had a distorted heart, probably because she lacked the love of her hysterical mother. Aki's parental love that she wants to love and Akihiro's girlfriend's love that she wants to be loved strangely end up creating a "devil". Aki built her forbidden parent-child relationship with her devil's distorted love and took a step towards her "mama".
