Games like Palais de Carnaval

If you finished Palais de Carnaval, the closest matches are Shoujo Shuryou no Suiri Ryouiki: Kogane Shima no Mitsuyaku, Amnesia, Harakuju Tantei Gakuen: Steel Wood, Diabolik Lovers: Lost Eden and Sotsugyou M: Male Graduation - Seitokai Naga no Kareinaru Inbou. All 8 share its visual novel genre and are ranked by how closely their themes and modes overlap.