Adhering to the motto of "Satisfaction is always happy", Su Buqi, the bastard of the demon family, has a genius brother who wants to get rid of him and then hurry up, and a demon sister who is playing black hands everywhere. In a large-scale encirclement and suppression activity in the Demon Realm, he was thrown away as cannon fodder and was thrown to the front line to meet a beautiful girl who claimed to be Daji, and Su Buqi's dream of a flat and stable life was messed up. Times are different, the monsters have changed their careers to do responsive firms, welcome to the League of Monster Loser!