A boy who worked at Cowherd Bar to raise money for his lover's surgery met a man who was called a devil's prison by the Japanese government.
Their meeting was actually a scam, they defrauded each other of money, love and life.
The boy hated the devil who forced him to leave his lover, but he didn't know that the real liar was not him... Love is a scam. The loser gets true love, but the winner only leaves the love of this life and leaves alone...
(Sweet ending)