Gu Ba was originally the villain's father in the novel True and False Daughter's Favorite. In his previous life, he was affected by mania and was instigated by a fake daughter to abuse his own daughter, forcing her to jump off a building and die tragically. He also ended up being betrayed by others and his family was ruined. After being reborn, Gu Ba activates a magical system called "Dad Lin". As long as he gives others "dad-like care", he can get rewards. Therefore, Gu Ba recognized his biological daughter in advance and repaired his relationship with her.
