The story takes place in an imaginary world in "the Age of Detectives", where private detectives and phantom thieves overwhelm the cities. It's about four girls who aim to be great detectives.

Weiss Schwarz is a trading card game featuring characters from popular anime, manga and games. Takeshi has been playing for some time now but shows hardly any signs of improvement. He has never beat Michi, his practice partner and classmate, or even come close to it. He decides however, against everyone disagreeing, to enter a Weiss Schwarz tournament to test his skills. Although Takeshi has heart, his passion for the game alone isn’t going to get him very far; he will have to learn and learn quickly if he wants to make any dent to this tournament.

In the *Tantei Opera Milky Holmes (Chinjaoroosu)* series: V.1 - *School Days* V.2 - *Variety Gift*