Hello guys, i am looking for a novel where mc is reincarnated to a boy who becomes a slave in school and getting bullied by a girl (who's later becomes his harem), also after being reincarnated he is playing crazy first, and pretend to fall in love with the girl who is often bullied the original owner of the body before. the mc is kinda savage after reincarnated, have harem, dark magic or something like that.