"Chihuahuas go anywhere."

Techichi Company, a private mercenary company comprised of werewolf agents from around the world. They join forces with Leto to rescue Ein, who is in danger in Berlin. Techichi Company demands Ein's special agent abilities in return for saving his life, and Ein and Leto are dispatched to Prague together as 'Black File' level operation partners.

The splendid golden city that we welcomed again. There, an unusual atmosphere awaited the two of them...

(Source: Lezhin, translated)