The Dog and Waning Moon

A devastated Kazuya quit boxing three years ago due to his retinal detachment. Now, the trainer by day and bar owner by night focuses his abilities on young, promising, poker-faced boxer Gaku Kuroko. He may be a little too much for the featherweight division, but why is he so dead-set on the title Kazuya was supposed to have?

(Source: Manga Planet)