i don't remember much but I remember it was a world hopping novel. The mc used to find the ml with a mole he had on his hand. On a apocalypse arc something happened and the mole disappeared. I think it was the apocalypse arc. I think the mole was the system the mc had. The system was a fragment of the Ml's soul I think. That's all I remember.
I'm not sure either, do you know which chapter the zombie arc starts in? I mostly remember the zombie arc so I might be sure if I read it.
It was the axa arch. He was sitting on a pile of bugs he had killed roasting a big leg for dinner... asleep.
I'm not sure if I'm mixing up my novels but I remember that on the apocalypse arc of the novel I'm looking for, there were two guys. One of those guys were a zombie, the zombie guy was the ml and the other guy was I think the OG!ML. I remember that the mc kept on getting killed by zombies, he could regenerate. Yeah so him and the ml work together and go to a human base and hide the fact that the ml is a zombie. That's all I remember.
It is Heroic Death System! the zombie arc starts in Arc 15: Death Cycle (first chapter of this arc is chapter 203).