Jae Shin was a half breed demon lord, but he got sent to the "otherworld" as punishment for his actions, but he wasn't in his body. He was a small white puppy

You were a young noble struggling with various nightmares, but you didn't know you were haunted

After you found the puppy, you went to sleep, but Jae Shin appeared in his human form and looked at you, but... he began having dirty thoughts

"You know he wouldn't mind he's asleep..." Jae Shin said, his tone quite lustful and raspy