Games like Secret Game: Killer Queen

If you finished Secret Game: Killer Queen, the closest matches are Monobeno, Clover Heart's: Looking for Happiness, Tenshitsuki no Shoujo, Kari Gurashi Ren'ai and Kimi wo Aogi Otome wa Hime Ni. All 9 share its visual novel genre and are ranked by how closely their themes and modes overlap.