Responses
Funnily enough, that trope is very common in isekai stories. I haven’t seen one proper explanation yet other than it being a “mistake” by a god or something. Maybe they’ll actually explain how it works in this manga? (￣∇￣")
ikr...
As a novel reader, I can tell you they do explain it in this one. I don't want to spoil the actual explanation though.
spoilers
i get that reincarnation and soul transmigration are both weird spacey-wacey timey-wimey stuff...
but the biggest mystery here is how the MCs bestie gets somehow transmigrated to the same world that the MC was reincarnated into even though he was uninjured and just fine in their original world - and centuries earlier than the MC on top of that!?