The series will explore an alternate universe to the main series, and will focus on Kouji Ibuki, an antagonist in the Cardfight!! Vanguard Movie: Neon Messiah, and Suiko Tatsunagi. (Source: ANN, edited)

Second season of Tantei Opera Milky Holmes.

Zenigata arrives at the birthday party of an important politician to investigate a fake Lupin calling card. Lupin shows up as well. Suddenly, masked assassins break in and begin to shoot everything that moves. Zenigata goes after Lupin amidst all the gunfire and corners him in the courtyard of the house. Suddenly, a hand holding a Walther P-38 pops out of a window and shoots Zenigata in the chest. Lupin recognizes the Walther as his own and decides to investigate. The assassins that attacked the party are from a hidden island called the Island of Assassins. The island is kept secret by the help of top government officials from around the world who use the assassins on the island for their own personal gains. There are lots of hidden secrets on the island, however, and Lupin, Goemon, Jigen, and Fujiko find themselves involved in a plot that tears the residents of the island in half. The movie also delves into Lupin's past in his pre-Jigen days. 

(Source: ANN)

Chihiro Enomoto is a freshman that just got to a new school called Rikkyoin High School. He lost his parents in a traffic accident when he was 10. Since then, he has been living only with his elder sister Shinobu. He is good at cooking and cleaning, and does all the housekeeping jobs. He fell in love with Tokino at first sight when he met her in the school library on the first day of school. Another girl named Ritsuko, a childhood friend of Chihiro and the chair of student council, falls in the love with the boy instantly after this long-awaited reunion. But she is not the only one who is in love with him. This is the story about a one-year campaign among the candidates for the next students government leaders, who are also chosen by the lot (kujibiki), in order to gain the position. (Source: ANN)