New Sprite game is called 蒼の彼方のフォーリズム (“Aoi no Kanata no Four Rhythm”) the subtext is: Beyond the sky, into the firmament. They’ve only announced the name, the staff, and a blank website with the promotional image here: [4rhythm.net/] <— gaijin blocked
Funnily enough, the artist is Not Akinashi Yuu! (who drew the art for Koichoco and Imaimo). Instead it’s two persons by the names of: 悠木いつか and 鈴森, both new to the scene. The art still looks really high quality though. For writers they got the person who wrote Harumade Kururu and Sukima Sakura to Uso no Machi) and another writer who has helped with two of the Grisaia’s.
More details available in September’s edition of Dengeki G’s Magazine. (about 23 days)
Here is the big wallpaper they used for the background of the site: ^ Wallpaper 1670 x 950