Battle Rabbits

Battle Rabbits (バトラビッツ, Bato Rabittsu) is a manga written by Yuki Amemiya and Yukino Ichihara. It was serialized in the magazine Comic ZERO-SUM from September 2014 to July 2016. It is complete in four volumes. The series is published in English by Seven Seas Entertainment.

Plot
Kokuryuu Kaguya joins the Battle Rabbits, an organization dedicated to protecting Earth from monsters, to get revenge against the demons who killed his father.

Official
Official English site