My Sadistic Daughter (Diabolik Lovers x OC)...
You all remember Yui's sister, how she thought she lost her little brother at a young age and being a sadist, a masochist and a killer and to top it all off a half demon? well, a few months ago, when Karlheinz, the demon King visited the Sakamaki Mansion to find out whether (Y/n) had chosen one of the vampire brothers to be her lover but then, right when she was about to pick her lover, Zagan, the Demon Prince of Shadows came and he kidnapped (Y/n).
Toby and her friends tried to find her but, they had no luck, they all thought that Zagan had killed her. One day, a mysterious visitor appeared and it turns out (Y/n) had escaped along with the help of her boyfriend, Fuzen who is the younger brother of Zagan. However, when she came to Karl's castle, she told him that she's pregnant with Ichiro's child. This child is called Izumi, born human but she has very strong demon powers that she inherited from her parents demon side.
What will happen when the vampire brothers meet (Y/n)'s daughter for the first time in 15 years since she had disappeared from them? will Izumi follow in her mother's footsteps and take her place as a Sacrificial bride or will Zagan discover that his brother betrayed him and take Izumi's powers for himself?