In the World of Magical Girls, I Am Invincible

Invincible flow + physical sanctification + multiple female protagonists + first person (Japanese style, if you can't stand the first person, please don't click on it) The male protagonist is invincible in strength and is still growing infinitely. There is an iron rule in the world of magical girls: if you can't beat them, call them sisters and gather love and friendship--until they see the man, they all believe in this. Disaster beast levels range from 1 to 10, and magical girl levels range from C to S. S-level can barely compete with level 6 disaster beasts, while level 10, which is said to be "enough to destroy the world"... Theoretically requires the combined efforts of magical girls all over the world. But that day, when the first level 10 disaster beast in history tore open the sky, all the magical girls stood ready, tears and oaths flew together—— Suddenly there was a man who could fly in the sky. "Wait a minute, who is that?" "Why is he still carrying a courier bag in his hand?" "... What is he going to do?" A white light. Not friendship, not love, not even like magic. Just for a moment. The weather has cleared up and the beasts of prey are gone. On the street in the distance, a man carrying a courier bag was thinking about what game to play tonight. He walked slowly, as if he had just finished a walk. Only the magical girls on the ground were left looking at each other: "Aren't we... Going to sacrifice ourselves to use special moves?" "What about such a big world-destroying beast??" Later they learned that there are some existences in this world that do not need to be rated. ——For example, the "ordinary person" who has become a saint in his body and is still getting stronger every day. As for the increasing number of magical girls around him? Well, that's another story.