Time Travel Error? It Doesn't Matter, You Can't Lose a Little!

[No system] + [Invincible] + [Single heroine] + [Pure love] "Don't you think this is too boring?" "It won't be boring. Just lower your strength to a level slightly stronger than the opponent every time, and you can enjoy the joy of fighting, hahaha!" No matter what kind of master, god, or even system user you are, as long as he wants to, he can fly away!