A media franchise owned by the Japanese trading card game company Bushiroad. It consists of:
- An Internet radio drama, released in December 2009.
- An anime adaptation by J.C.Staff, the first season of which aired between October 7, 2010 and December 23, 2010.
- A manga adaptation serialized in Comp Ace from 2010.
- A visual novel PlayStation Portable game, released in Japan on December 16, 2010.
- A trading card game tie-in with Bushiroad's Weiß Schwarz.
- A light novel series published by ASCII Media Works under their Dengeki Bunko label.
The series is a homage to the detective fiction genre, and the four female leads are named after famous fictional detectives: Sherlock Holmes, Nero Wolfe, Hercule Poirot and Cordelia Gray.
The following tags are aliased to this tag: milky_holmes.