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
Four-Panel Heroes
ONA
10m
Immortality 2nd Season
ONA
24m
Spirit Wind Elegance 2nd Season
ONA
25m
Kyoukai Senki: Kyokkou no Souki
ONA
10m
All Saints Street 4
ONA
4m
Kengan Ashura Season 2
ONA
24m
Mononogatari 2nd Season
TV
23m
Record of Ragnarok II Part 2
ONA
24m
Link Click Season 2
ONA
25m
Yami Shibai 11
TV
4m
Synduality: Noir
TV
23m