A half-man, half-gumiho nobleman, longs to become human, as a fearless fighter hides her female identity, they fall in love while searching for a mythical Gu family book that contains the secrets the nobleman needs to become fully human,Gu Fammily Bookgu family book ost,br #Gufamilybook #Gufamily #halfgumiho #Gumiho #drakor #actiondrama #korean #serieskorean #action #koreanfantacy #koreanaction #koreanaction #dramakorea #koreancomedy #serialdrama #serialkoreanbr