A while back I read this novel where the mc soul "reincarnate" into this guy body, after this guy kill himself when his finance break of the engagement. (???) The mc then tell them that in 3 years (???) he will personally come to break off the engagement. Then he went to this island, and become this girl fake husband and enter this competition between the "four big family" (???). By the way this is a competition of pharmacy. I believe the mc win this competition, later on there is this "space" that open on the island, so the mc enter there and gain some loyal people for him: a fire magician, and two level 6 magical beast. Then he went home and realize that his family encounter some problem. His two brother came back and the three of them kill the major family that cause trouble for their family. Does anyone know the name of this novel? Btw, the finance thing is similar to BTTH but it's not BTTH.