In a world of Kemonomimi, Natsuno & Gareki are a young pair of twin wolves who used to be in a fight ring. Their 'manager' sells them to a rich family with 2 sons; Yogi and Tohru, whom the family expects the two ex-fighters to play bodyguard for. But, after growing up in such harsh surroundings as the Ring, Natsuno and Gareki have to learn that it's ok to trust someone else.