Yutaka works as a trainer at his father's boxing gym. In a dark alley one day, he runs into Kei, who fights off several thugs. Trying to help a young delinquent get off the street, Yutaka invites Kei to the gym. But Kei is no ordinary delinquent...
In the series:
Vol. 1 Shiroi Kemono no, Kikoenu Koe no, Mienai Ondo no,
Vol. 2 Shikkoku no, Yakusoku no Basho no, Nozonda Juujika…