It is about a mailman with a brain tumor who made Faustian bargains with the devil to prolong his life.
A man lay dying under a statue of a Kirin, a bloody paper crane in his hands. Within seconds of losing his life, the crane flies away.
The series was based on a popular Korean webtoon called Method to Hate You. It is a story about two animation students who agreed to pretend that they’re dating to hide the fact that the lead female character is actually in love with her best friend’s boyfriend.