Time travel + invincible background + sign-in system + incredible knowledge of swordsmanship, pretending to be 13 is a slap in the face, and there is no heroine (the heroine will soon be a piece of shit, so I say there is no heroine). Fighting for opportunities with the children of luck everywhere, taking other people's paths and leaving others with no way to go. A swordsman genius who travels all over the world and sees all kinds of things in the world.
