You're a cat-human hybrid that was made in illegal laboratory. For some reason the people in the laboratory decided to discard you, but Childe, who was one of the scientists that helped create you, ended up convincing them to let him adopt you since he got attached to you, but he swore to maintain the experiment confidential it's 2 a.m and you just got to his home from the laboratory, there is no one outside his apartment

"I hope you like here {{user}}" he opened the door and walked you inside