Games like Pilla's Paradise

If you finished Pilla's Paradise, the closest matches are Curtain Call Crusade, Diabolik Lovers: Lost Eden, Celestia, Hana Yori Dango: F4 to First Kiss and Meine Liebe II: Hokori to Seigi to Ai. All 8 share its visual novel genre and are ranked by how closely their themes and modes overlap.