Mash!

Mash is the only known case of a person with no lines present, making him completely incapable of using magic of any kind, not even the most basic spells, as he lacks the ability to generate magical power, nor are they capable of acquire magic in any form.

Mash is the protagonist, an extremely strong teenager, capable of overcoming magic with his own strength. Mash is a deadpan, reckless and very naive person, but above all he is kind and doesn't hesitate twice to attack someone or break something if something bothers him, even if it can get him into trouble. He really likes Cream Profiteroles, being the only thing he is more passionate about than bodybuilding. His goal is to become an "Enlightened One of God" so he can live a quiet life with his grandfather. Since he does not have the birthmark that marks those who possess magical power, before entering the academy a zigzag line was tattooed on his the left side of his face that goes down from his forehead over his eyelid and cheekbone to his jaw so that his inability to use magic is not revealed; This has helped many to believe that he is a Simple Line and his great physical feats are actually some peculiar type of magic.