Disappeared Dad: None of the children's fathers have been in their lives.However, this actually her fear for her children than anything else. Dark Secret: Yui has kept the fact that her children's fathers and vampires from everyone, especially her children.Fortunately, she got her act together and became a loving and hard-working mother for her children. However, she soon discovered that was she having her rapists' children. She did managed to run away from them and was found and taken in by a kind couple. Then one night, she was rape by the very demons that abused her for her blood. The man who she thought was her father was actually her adoptive father with him trying to kill her because he said that she was possessed by a demon. More demon boys appeared and only wanted for her blood. Dark and Troubled Past: Yui was sent to become the Sacrificial Bride to the Sakamaki brothers by the very church she had faith in and was soon abused by the brothers for her blood.Chapter 9 has the title 'The Moon and its Stars', and it's an information chapter on Yui's children. Cosmic Motifs: The Chapter names have moon motifs.Which is a big surprise since he wasn't type before that night. Cool Uncle: Laito is one to his niece, Airi.Children Are Innocent: The younger kids have yet to understand things such as how babies are made.However, she loves them regardless of this. Child by Rape: All of Yui's children were born of rape pregnancies.Justified, because they have a much warmer childhood under their mother's care, unlike most of their fathers. Cheerful Child: Some of the kids are this.Broken Bird: Even after Yui accepts her children and becomes a good mother to them, it doesn't erase the emotional scars Yui got from their fathers.The Baby of the Bunch: The quadruplets, especially Kaoru, are the youngest among Yui's children.But they all still care about each other. Annoying Younger Sibling: Some of the older kids feel this towards to the younger ones.Being raped, having her children because of the rapes, her daughters being held captive unless she goes to a birthday party, and then having to meet her abusers/rapists again after twelve years is clearly taking a toll on her mental health. Adaptational Angst Upgrade: The story isn't so kind towards Yui.Minato got an adult to the scene and the parents were sent to jail while the girl got to live with her aunt and uncle. Minato had followed a girl and discovered she was being abused by her parents.Sejij tried to kill Yui when they met again, because he said that she was possessed by a demon.He placed a drug in the boys' drinks which caused them to rape Yui, so she ran away from them. Like in canon, Karlheinz enjoys messing with his sons' lives.Abusive Parents: Hey, it's Diabolik Lovers, what did you expect?.Years have passed and when Yui thought she finally had her life together with her adorable children.They come back into her life. Even though they remind her sometimes of that horrid night. But does Yui despise these children? No, they were hers and she would love them till the end of time.