FROM JUMPSUITS

From Jumpsuits summary:

Fourteen-year-old Sora Habara joins a young yakuza group in hopes of adding a little hazard to his boring high school life. He soon realizes that adding even the slightest danger to his life can turn his world upside down.

Fourteen-year-old Sora Habara joins a young yakuza group in hopes of adding a little hazard to his boring high school life. He soon realizes that adding even the slightest danger to his life can turn his world upside down.