[Single Heroine] [No System] [Semi-Sweet] [Doomsday Guardian] + [Fast-paced, never procrastinating, not a turtle man, never unreasonable if he can do it]
When the edict came, Gu Ci, the strongest sympathizer, fought until the last moment. The moment he died in battle, he declared the end of human civilization. When he was dying of consciousness, the strange stone left by his deceased wife flickered. When he opened his eyes again, he returned to his middle school days.
In this life, even if the end is inevitable, human civilization will have a different ending due to his return. The answers that were not found in the previous life will definitely appear in this life.