ok so first jihoon got really bad injury and act like a different person entered jihoon body but he doesn't even know his previous bodys name or appearance he only know hes red belt and in the same bus as them too. second, mc told there's no one in the bus other than the master and driver and the third this "jihoon" say something like the jihoon that got the mc flashback again it made sense that jihoon is js lost his memories and theres no one entered his body