Exposure: I Saved the World and Disappeared into Dust

I don't know how long I have been here, but one day the system suddenly told me that my mission was over and I could relieve myself of the heavy responsibilities and enjoy life. The system teleported me to a world without darkness or war, only a world of peace and beauty. Is this really the case? ? "Heroic spirits... Humanoids... Ship girls... Valkyrie... The human empire..." I seem to have forgotten something. But at this moment, in the world he once saved, the sky is falling quietly. His once supreme achievements should not be forgotten. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.