Arknights: The Miserable Doll of Pain and Suffering Vol 1(Being Revised)

"Things happen beyond your control, no matter what you do. What matters is, what will you do after they happen?"

He had a normal life living as a 15 year old. There was no grand backstory that he had, no troubles beyond money, school and social life that he had. He lived a dull life with a blind mother at home and an absent father at work.

Until he died of a heart attack in his sleep, where an entity gave him a chance: reincarnate in a miserable and post apocalyptic world as one of the game characters he played or move on to the afterlife.

He chose the former.

Only there were more than the terms presented to him.

Decaying Winter belongs to Archimexus.
Arknights belong to Hypergryph and Yostar.