Devil S Night Song

JaeSin was turned into an insignificant small creature and ousted to the human world for violating the law of causality and the only way he can go back to the underworld is to win a human's love. He doesn't believe in human emotions until he bumped into a crown prince, Nok, who's been suffering from heartbreak for a long time. He then started getting curious about him… “There you are. A fool with unrequited love.”