The Savior's One Million Rules for Survival

I once joined heroes from another world to battle on the stage of eternal night. I once watched the starlight of a fallen magical girl streak across the night sky. I once traveled through the Victorian era of steam-powered wonders and danced with the Queen. I once attended the Jixia Academy, observing the debates of a hundred schools of thought and offering sacrifices to the world on behalf of the sage. I once traversed the five continents and four oceans, maneuvering and leading heroic spirits to fight against the six paths of reincarnation. But now... looking at the sage sister with a dagger hidden in her smile, the magical girl with an axe on her back, the heroic swordsman sharpening her blade, and the sneer of Her Majesty... I feel... I won't live much longer. So I leave behind this collection of survival rules for future generations to remember. Survival Rule One: If you can't die, then die! Survival Rule Two: Never mess with yanderes... This is the story of a savior, struggling to survive and occasionally saving the world in various strange singularities and an overworld filled with heroic spirits, ship girls, apostles, Pandorans, and other alien creatures.