The Identity System of All Heavens and Worlds

What is good and what is evil? Don't you know very well that good and evil are written by the victors? So put away your hypocritical justice! Rentaro! Look, this is the person you are risking your life to protect. You have said so many beautiful words, but in the end, your desperate efforts only moved yourself! Got it! (Single female protagonist) Semi-invincible flow into a new world and a new identity The world is tentatively set: Black Bullet (Main World) - Game Life. Zero - Big Fish and Begonia - National Team - Seraph of the End - Fox Demon Matchmaker