Baharui Jimseungeun Meogitgameul Nochiji Anneunda

Following his mother's will, Yarn came to the capital to find his aunt from whom he was separated when he was young. After successfully landing a job at the mansion where his aunt worked, Yarn is given the job of 'feeding monsters'. He goes to feed the 'monster' locked in the underground prison, but is this a monster? The monster is too handsome....