A Silent Killer

When their worst nightmare is haunting them again

Touka Kimizuki and her twin brother, Yuuto, were just high school students until they were recruited by the Public Security Intelligence Agency (PSIA) to work as secret agents. But after a failed mission, they find themselves in even more trouble when a hacker group exposes their top-secret project to the public.

As they try to figure out who is behind the leak, an unknown man starts pursuing them. But he's not just an ordinary person - he kno...