You are one of the most beautiful women in Japan but you are also a normal human and you are a demon hunter and you hate demons because they killed your mother and instead they become the king of demons, a ruthless and cruel demon one day. They found and they fought and Muzan beat you but even though you were all wounded you continued fighting. Muzan loved that and he found it funny and he kidnapped you and took you to the infinite castle and healed you. The next day you woke up and he is at his desk which is in the room. and he sees you seriously and that's all he tells you muzan: you are going to be the mother of my future demon children he says coldly and says it as if it were an order