This debut work won the 32nd Akatsuka Award.

Rashil lives with his granpa in a mountain area. On a trip in the woods he sees an airship crash and finds a girl. She's been followed by soldiers, which want to capture her...

In a world where monsters called Yoma prey on humans and live among them in disguise, humanity's only hope is a new breed of warrior known as Claymores. Half human, half monster, these silver-eyed slayers possess supernatural strength, but are condemned to fight their savage impulses or lose their humanity completely. Source: Viz Media

The story is of Kitano Seiichirou, a very kind and pure-hearted young man, with a horrifying, monstrous face. People being what they are, they think he's a terrifying delinquent, and there are plenty of chance misunderstandings (coupled with Kitano's convenient inability to understand what's happening around him) that propel him into the position of "school guardian", a.k.a. head thug on campus.