This hateful world only allows handsome guys to date! 'Below average guy' and Chinese restaurant delivery guy Kang Dae-oh was born single and solo until now. He has a crush on college girl Ye-rin whom he fell in love with at first sight but is blocked by her spec and hasn't been able to tell her his feelings yet.

Four friends pledge to commit suicide together but while standing on the ledge, only one of them actually jumps. Her ghost begins to haunt the remaining friends until the pledge is fulfilled.