The Yakuza's Bias manga volume 1 features story and art by Teki Yatsuda.

Ken Kanashiro is one of the top lieutenants in the feared yakuza outfit the Washio Clan. He lives his life by the code of the Japanese underworld, where nothing is more important than loyalty, and ties between soldiers and their aniki are sacred bonds. Ken's never had time for hobbies... until the boss's only daughter Megumi drags him to a K-pop concert, and he sees the glittering, charismatic Jun for the first time. Smitten like a new recruit on his first job, Ken plunges into fandom with the solemnity and passion only a true man who walks the way of the yakuza could muster.

The Yakuza's Bias manga volume 2 features story and art by Teki Yatsuda.

Ken Kanashiro has taken the vow of brotherhood in the world of K-pop fandom. His devotion and commitment to MNW -- the hottest K-pop boy band -- inspires many around him, including his rival, Kinji Mizuhara. When Miss Megumi is not able to attend the upcoming concert (or "celebration" as Ken calls it), Kinji jumps at the chance to see his bias in person for the first time. With primal fervor, the yakuza fanboys are treated with excellent fan service and become more determined to attend the upcoming handshake to repay their debts.