Kurozakuro 4

Mikito Sakurai is tired of being a punching bag for all the delinquents on campus. But what can he do? By nature he's a gentle and easygoing high school student. That all changes the night he swallows a mysterious orb and meets Zakuro, a strange kid who promises to grant his most heartfelt desire. "When you wake up," says the pint-sized apparition, "you'll be stronger and better than a human."

Mikito has joined a team of monster hunters in their search for the secret of the ogres. His preternatural powers are increasing daily, but he’s still a little wet behind the ears. That's about to change. The youngster is on course to knock heads with the Black Thorns, a battle-tested team of assassins.