Demon Slayer: I Became the Guardian of the Ghost King

[Time travel + atypical ghosts + system? No, it's raising a baby + Infinite City demolition office When he woke up, Lin Yi became a wild ghost in the Taisho era. He had never eaten a human being, but he was chased for three streets by the Demon Slayer Squad as a trash fish. Just when he was about to lie down and die, a little girl with blood on her head pulled his trouser leg. "Brother, can't you find a home either?" Lin Yi looked down. This girl is wearing the signature little dress of the Kibutsuji family. And behind her, stood the ghost king with a pale face and sinister eyes - Oniwu Tsuji Muzan. "Human," Wuhan's voice was as cold as a knife, "I give you two choices, kill her by me, or take care of her for me!" Lin Yi: "???" So you, the Kibutsuji family, take care of your children and run a family business, right?