Island in a Puddle 4 - Kei Sanbe - Bog

"Mistaken for Kuromatsu, a ruthless killer known in the underworld as "The Neck Breaker," Minato finds himself caught between rival Yakuza factions and thrust into a situation he can't run from. Meanwhile, the real Kuromatsu (a.k.a. the fake Minato) plots his next move against the man who set him up--a detective who happens to be an acquaintance of the Myojin siblings. Kuromatsu sends a video that threatens to expose the detective, but Minato has a surprise in store for both of them."--Publisher.