Based on the comic Gokuburi Deka.

Enigmatic teenager Akira Inugami is, by night, a powerful werewolf, who falls for a beautiful young teacher, and copes with a ruthless teen gang leader, whose yakuza father murdered Akira's parents years before.

A shikakenin was an under-the-cover trade that undertook killing in Edo. Hanemon of Otowa, an agency that introduced laborers and maids, was also one of these. Katsugoro Iseya was a timber dealer who had come in as a client. His target was the constructions magistrate Hanno, and the Tatsumiya who sipped on the benefits. Hanemon who had a stong code towards killing, where he would only kill those who do no good to be in the world, accepts this request. Baian Fujieda, a needle doctor would carry out the killing. However, the professional killer Baian fails to bring down Tatsumiya. Hanemon then looks to another shikakenin, the ronin Sanai Nishimura for the role. Although Sanai's ability with the sword is good, he lives poorly in a tenement, and accepts this commission on the condition that it is kept a secret from his wife and child. Here, they close in on Hanno and Tatsumiya again...

Set during the declining years of the Tokugawa shogunate, Shadow Hunters details the questionably noble exploits of three ronin who act as "Shadow Hunters". These three ronin are not your normal ornery ruffians who are looking for a drink, a broad and someone to jab a sword into, but are in fact former samurai who, rather than follow their destroyed fiefs and murdered masters into death via seppuku, have dedicated their combined sword prowess to stopping the government from raping its daimyos for valuable resources.

Young man and woman experience changes in their worldview and question the meaning of life after meeting a dying grandfather.