Looking for a Shounen Ai

I actually don't remember if it was a Shounen Ai, but it was about a demon prince who hated living in hell so he escaped with a cat demon nurse I think lol. The demon prince changed his form so he's this "weak boy" so nobody recognizes him. I remember he was always fascinated with humans, so he attended a school as a "normal" teenager. The only way to know if he's the demon prince is a symbol on his back I think. So the Demon king sends some people to bring him back, the seme is apart of this group and falls in love with the demon prince, but he's still trying to look for the demon prince not knowing that he fell in love with him. I think after a while he suspects the uke of being the demon prince, so he tries to get him shirtless to see his back to identify if he's the demon prince or not.

Thank you (๑•ㅂ•)و✧