Premieres on April 5th. The new PV is here. Check out the ANN article for additional information. Synopsis from AniList:

The second season will focus on two new cases from the novel series, adapting the two-part third volume Shuuki Gentei Kuri Kinton Jiken (The Autumn-Exclusive Kuri Kinton Case) and the fifth volume Touki Gentei Bonbon Chocolat Jiken (The Winter-Exclusive Chocolate Bonbons Case).