Kim Rok Soo wakes up in a fantasy-harem novel called 'The Birth of a Hero' only to find out he's possessed the body of minor-antagonist (and unlikely omega) Cale Henituse at the tail end of his heat--with a heat partner! Things become more complicated as he deals with the change in his biology and the accompanying new urges. Follow his awakening into an entirely new world as he tries-and fails- to get a stress free slacker life all while maybe gathering a harem of his own.