Manga
A manga adaptation illustrated by Sorahiro Mizushima was serialized in Kadokawa Shoten's Comp Ace magazine between May 2010 and January 2011 and was published into two tankōbon volumes.
Anime
An anime adaptation of Tantei Opera Milky Holmes by J.C. Staff aired between October 7, 2010, and December 23, 2010, and was also streamed by Crunchyroll. A special episode aired in August 2011.[4] A second anime season co-produced between J.C.Staff and Artland, titled Tantei Opera Milky Holmes: Act 2 (探偵オペラ ミルキィホームズ 第2幕) aired in Japan from January 5, 2012, to March 23, 2012, and was streamed by Nico Nico.[2][5][6] A third season, titled Futari wa Milky Holmes (ふたりはミルキィホームズ), co-produced with Nomad, aired between July 13, 2013, and September 28, 2013, alongside live action segments featuring the cast.[7] The series is set two years following the other series and focuses on a new pair of protagonists.[8][9] A fourth series titled Tantei Kageki Milky Holmes TD (探偵歌劇ミルキィホームズTD) began airing on Tokyo MX began airing in January 2015.[10]
A TV special episode based on the PSP games, titled Tantei Opera Milky Holmes Alternative One ~Opera Kobayashi and the Five Paintings (探偵オペラ ミルキィホームズ Alternative ONE～小林オペラと5枚の絵画～), was streamed on Nico Nico Douga between August 19 and August 25, 2012, before airing on Tokyo MX on August 25, 2012.[11][12] A follow-up special, Tantei Opera Milky Holmes Alternative Two ~Opera Kobayashi and the Raven of the Empty Sky~ (探偵オペラ ミルキィホームズ Alternative TWO ～小林オペラと虚空の大鴉), was announced and both Alternative episodes were released on Blu-ray and DVD on January 9, 2013.[13] A new anime series will premiere in December 2016.[14]
Music
For the first season, the opening theme is "Seikai wa Hitotsu! Janai!!" (正解はひとつ!じゃない!!) by Milky Holmes (Suzuko Mimori, Izumi Kitta, Sora Tokui and Mikoi Sasaki), while the ending theme is "Honnō no Doubt" (本能のDOUBT) by Faylan. The ending theme for the TV special is "Party Party!" (パーティーパーティー!) by Milky Holmes. For the second series, the opening theme is "Nazo! Nazo? Happiness!!" (ナゾ！ナゾ？Happiness!!) by Milky Holmes while the ending theme is "Lovely Girls Anthem" by Natsuko Aso.[15] For Futari wa Milky Holmes, the opening theme is "Glory Glowing☆Days" (ぐろーりーぐろーいん☆DAYS) by Milky Holmes while the ending theme is "Seishun Beginner!" (セイシュンビギナー!) by Milky Holmes Feathers (Ayasa Itō and Aimi Terakawa). For Milky Holmes TD, the opening theme is "Milky A Go Go" (ミルキィ A GO GO) by Milky Holmes, while the ending theme is "Tankyū Dreaming" (探求Dreaming) by Emi Nitta.
A maxi single, Colorful Garden, was released on April 6, 2011.
Video games
A visual novel developed by Bushiroad was released on PlayStation Portable on December 16, 2010.[16] Players play the role of Opera Kobayashi, who must train Milky Holmes to be great detectives and use their abilities to stop thieves. The game's second chapter, Tantei Opera Milky Holmes 1.5 was released on September 29, 2011, from the PlayStation Store.[17] A sequel, Tantei Opera Milky Holmes 2, was released on August 23, 2012, casting players in the role of a new protagonist named Ellery Himeyuri.[18] A new music-based video game based on the animated series was announced by Bushiroad in July 2013 for release in 2014.[19]
Other appearances
The four main characters of Milky Holmes appear briefly in many different episodes of Cardfight!! Vanguard as cameos where they are simply shown in the background. The voice actresses also make a cameo as the Milky Holmes in episode 23 of Fire Leon, a live action series also produced by Bushiroad. In this scene, Suzuko Mimori portrays both Sherlock Shellingford and Yû Kusayanagi, a recurring character of the series. Additionally, the character "Sherlock "Sheryl" Shellingford" appears as a "guest" partner in the Japanese MMORPG Onigiri Online.
Movie
An idea of a movie adaptation was first teased in the form of clues hidden within the end cards of the delayed fifth episode of Tantei Kageki Milky Holmes TD for fans to solve. Tokyo MX, TV Kanagawa, Hokuriku Broadcasting, TV Aichi and Sun TV aired the same episode in different regions, but showed a different pair of letters in the end card, which when rearranged vertically could be read as "Milky Movie".[20] A leak also emerged from the Japanese retail website Gamers' listing for the April issue of Monthly Bushiroad magazine, which included an image sample of a bundled publicity image extra which said "Milky Holmes movie adaptation planning start!!" The image has since been taken down from the website.[21] The existence of the project was officially revealed later in a special edition of Miru Miru Milky, a variety show starring the main voice actors, and confirmed by the Milky Holmes official website the next day. However, it was also announced that they need support from the fans to realize its production, meaning the project hasn't gotten greenlit for production yet.[22][23]
