I think it starts when he got adopted by the strongest hunter in korea or the world? And then he become like office worker of Gate monster but later on, some high level monster cause chaos and it killed his foster dad and other hunters and then he went back in time but he still retain his old body and then train future hunters..
I think it starts when he got adopted by the strongest hunter in korea or the world? And then he become like office worker of Gate monster but later on, some high level monster cause chaos and it killed his foster dad and other hunters and then he went back in time but he still retain his old body and then train future hunters..