Kim himchan live in the human world with his only sister who were blind since she invovle in an accident which make a damage to her eyes.Their parents were suddenly gone just like that leave two kids alone in that small house.Being the only man between the two,himchan keep trying to find a job for their living and finally get a job at the hotel.He should take care of his sister and because of that,he can't do any part time job at the night because scared there's something will happer to his sister,Song.despite of the live they been,himchan always been a hyper go-lucky kid which keep showing his smile when he with the other kids.that's didn't mean it's were a fake smile,it sincere from his heart.it just that he can't make anyone saw his soulless expression which will make him looked really pathetic.He also always being jumpy and playful around people even if they are a stranger.Himchan also has a big birthmark which people always mistake it as a tattoo since it were so big and looked like a tattoo.It's form from his neck that near with his ear until his shoulder at the left side.