Games like B-Project: Ryuusei Fantasia

If you finished B-Project: Ryuusei Fantasia, the closest matches are Jack Jeanne, Fortissimo, Uta no Prince-sama: Amazing Aria, Uta no Prince-sama: Sweet Serenade and Marginal #4: Idol of Supernova. All 7 share its music genre and are ranked by how closely their themes and modes overlap.