On the islands of Cremona, a vigilante runs amok. Celebrated by some and hunted by others, the notorious "Killer B" takes justice into his own hands, armed with a sharp blade and superhuman abilities. Unable to apprehend this renegade, the Royal Investigation Service (RIS) calls upon the expertise of Keith Flick, a seasoned, yet eccentric detective who was relegated to the Archives Department following a personal loss. As crimes in Cremona begin to escalate, from stealthy executions of wrongdoers to sophisticated strikes on public figures, it soon becomes clear that there is more than one person responsible.
With the help of his impulsive sidekick Lily Hoshina, and unexpected aid from the elusive Killer B himself, Keith begins to unravel plots involving secret organizations, domestic terrorism, and human experiments. When the involvement of the RIS extends beyond the scope of justice, the extent of the government's corruption—as well as the trustworthiness of close allies—are thrown into question.
[Written by MAL Rewrite]+ More
Characters & Voice Actors

Hoshina, Lily
Main
Kokuu
Main
Abbot
Supporting
Brandon, Brian
Supporting
Crouse, Richard
Supporting
Henry
Supporting
Izanami
Supporting
Julian
Supporting
Kamui
SupportingRecommended for you
My Star: Season 2
TV
24m
Shadows of the Void
ONA
22m
The Secrets of Star Divine Arts
ONA
10m
New Qin's Moon
ONA
20m
Overlord: The Sacred Kingdom
Movie
135m
Time-Patrol Bon 2nd Season
ONA
27m
Caged Character
ONA
15m
Glorious Revenge of Ye Feng
ONA
11m
The Proud Emperor of Eternity
ONA
16m
Tales Of Dark River
ONA
19m
Tales Of Dark River Part 2
ONA
19m
Sengoku Youko - Recap
Special
24m
The Young Brewmaster's Adventure
ONA
18m