The Eminence in Shadow, Vol. 7 (manga)

Cid's shadowbrokering fun is interrupted when his sister Claire drags him off to the Lawless City to hunt some vampire called the "Blood Queen" or something.To fit in with this hard-boiled town, he decides to give his background character persona a break to try out a new role-a man of mystery who laughs in the face of danger!However, the legendary Red Moon that rises over Cid's carefree head might be more than just an ill omen...