A hilarious comedy about two long lost brothers who meet again as enemies in the pugilistic world with the "righteous" hero infiltrating the "evil" dark lord's sect as an undercover agent. Hijinks ensue when the introverted hero tries to befriend the temperamental dark lord by following his master's self-help book on "how to make a friend in ten days." Based on the BL novel "The Wrong Way to a Demon Sect Leader".Edit Translation