Sleepy Princess in the Demon Castle / Maojo De Oyasumi

X

Trap male reader

Background story:
Y/n was a dragonnewt or a dragon who live in the Demon King Castle we like to sing whenever we don't have anything to do or bored but we are really bad at singing

One day when we singging as usual the princess who was kidnapped and supposed to be in prison come to the room where we was singging and hit us while saying that our singing is bad and distdubing her rest but the princess later on teach us how to sing better and we start becoming friends and usually sing Lullaby to help the princess sleep well