Knight Hunters - S01

Aya, Youji, Ken, and Omi are four young men who make up Weiss Kreuz (WK),an assassin group that takes out certain threats to society. Each of them has his own signature way of fighting. Aya is skilled with a katana, Youji has mastered strangling people with strings, Ken is deadly with his metal claws, and Omi specializes in all kinds of projectiles. A mysterious man known only as "Persia" gives them orders, sending WK after drug rings, terrorist factions, and similar targets. But as time goes on, they find that most, if not all, of the criminals they have dealt with are connected in some way to the Takatori family. The Takatori family is rich, powerful, and influential. It looks like if they want to cut the problem off at the root, WK will have to bring down one of Japan's most prominent clans.