Kizu, written by Otsuichi and drawn by Hiro Kiyohara, follows the life of Keigo. Like most other children, Keigo attends school, but his school is different. All of the troubled kids - the troublemakers, the abused, the scarred - are grouped in one class. This manga is a really short story. It's only 4 chapters long! But, despite that, it's a really impactful story.