Global Doomsday: but I Am an NPC

[Amnesiac male protagonist + single female protagonist + apocalyptic system + decisive killing] The male protagonist lost his past memory and only remembered that he was a mercenary. He woke up in a heavy rain and picked up a small potato. "Girl, do you still have the strength to run? If so, grab my hand and I will take you running." "Well..." The end of the world is coming, everyone has their own synthesis tree, betrayal, killing, black and white, but it seems that this is not a game about cooperation. Feng Yuhan's wish was very simple, just to live with his little potato magic fairy, but in this twisted and dangerous world, it was nothing more than a luxury wish. The adventurous journey begins, where will they go?