She is the supreme killer who came from time travel, holding the ancient magic weapon in her hand, and alone in the world, he is a black-bellied evildoer who hides his power and bides his time The black-bellied prince has been entangled ever since. When the idiot meets the trash, the ruffian meets the hooligan, should they fight tit for tat, or join hands to kill and subvert the world...