Synopsis

It wasn't the apocalypse that broke him. He was strong enough to survive that. But when his childhood friend died for him, that was when Lu Hao realized he had made a mistake. Now he had a chance to fix it.
(This is an expansion of the story "At the End of the World", as told by Lu Hao. It is told in three parts: arc 1 involves Lu Hao and Hong Sheng's childhood. Arc 2 delves into the original events of the first timeline, which resulted in Hong Sheng's death. Arc 3 shows how Lu Hao uses his second chance when he wakes up before the apocalypse - before Hong Sheng dies.)