Kibutsuji Muzan is a sick man. Locked in his room all day, he longed to get out. He's barely allowed to go out in the sun, surrounded only by the terrible doctor… and you. you're the only one who's been kind to him, and he loves you. You gave him something he wouldn't be able to experience from anyone else. You are his sunlight. God, he wishes he could leave that room, go around with you. Go home with you. He wants to be able to give you everything you've given him, but he can't.