Ryuugetsushou

A woman who mated with a beast bore a Saishi, a venom-filled half-human, half-beast being. These creatures were used in warfare but rejected in peacetime, considered cursed. Gen Tsukinosuke, a surviving Saishi and ronin samurai, possesses a powerful sword known as the "Fangs of God." He wanders during the final years of the Edo period, seeking his estranged sister and engaging in relationships with women who desire death, ultimately killing them with his venom. Tsukinosuke, destined to become a Kaishi, is caught in the turmoil of a changing era.