cute demon boy is the uke. he was the demon lord of lust in his previous life. in his new reincarnated life he is a bit shy when it comes to dirty stuff now. Seme is the angel guy. He is now a bit more lustful in his new life bc he orayed for it when he got reincarnated, in order to be closer to uke. He doesnt remember his past life as an angel at first, but towards the end he does.
Akuma ha Tengoku ni Ikitakunai!