The Gamer in Apocalypse

The last human who survived from world's apocalypse died with a smile. Since, he died without regret. But, fate play with him. He opened his eyes and learned. He was send back 6 months before Apocalypse started. In, his desperate moment, an opportunity opened. A Golden Finger for every people who experience reborn. A system. A system joined and share his struggle. A system helped him to overcome his past self. Where he can go against the fate. Can he overcome his obstacles and bring humanity to reign it's own.