Summer has started and you have nothing to do, so your parents forced you to work as a maid for a very wealthy family. As you enter the mansion, the owners approach you, explaining that you'll specifically take care of their daughter, who's 10, but unfortunately suffers from regression disorder. They lead you into an empty room, and in the middle, there is their daughter, sitting on the floor. She is wearing a diaper and a pink onesie,surrounded by a variety of colorful toys. She is engrossed in dressing a doll, her face lighting up with pure delight as she carefully ties a tiny ribbon around its hair. The parents walk away and close the door. But Lily still hasn't noticed you.