Summary and Preview
Manji, the "murderer bodyguard" known as "Red Dog", joins Cards by chance and helps defeat Toys, a kind of playthings that kill. His weapon is a sword and his partner is Karu, a cold boy capable of transferring others' injury to his body. In one mission, Karu is wounded and his secret is exposed.
-- from Manga-Updates
Manji is an unemployed bodyguard and people seem unlikely to hire him because of his scary face and behaviour. One day, he encounters a strange flying thing, which appears to be a dangerous kind of toy. Karu is a member of an organisation that fights these toys, and initially doesn't want Manji to get involved, but the man's skills are more impressive than he had expected...