Trouble Loves Company (Remake)

(AN, This is an alt account of mine. My other account has the original to this story, but it was too, clunky and had too many grammar errors and loose strings left. So this version will hopefully be much better._Based shortly after the introduction of Chikage Rokoujo in the anime time line.
Trouble loves company is what they say. First, mysterious grizzly murders begin happening across the city. The killer calls themselves DeadWolv, and appears to be some form of unstoppable monster hellbent on avenging the death of two innocent people over ten years prior. The killer soon faces off against the van gang, and Chikage. It spares them, and ends up forming an unlikely interest in the play boy biker gang leader.
Meanwhile the Yakuza have their own problems. Someone keeps attacking their men , even killing some of them. None of the survivors know who the attacker was for it was too quick. And all the dead ones have two things in common. Bite marks on their throats, and a great loss of blood despite no blood at the scene of the crime. Is it possible a vampire is attacking the yakuza,and if so why? Things get worse when Haruya notices his informant Orihara is acting odd, wearing sunglasses even at night, and looks paler than usual.
But things get worse still. An old enemy of the Awakusu kai has returned. A crime family known as the Shirois, who often deal in human trafficking. It seems they wish to end their feud once and for all with a final killer blow. By kidnapping and selling the young Akane Awakusu.
During all this chaos one young woman seems to know more than she should. And she knows, each of these happenings are all connected together forming a picture of a tragic story.