Games like Prima Doll: Kouto Tantei

If you finished Prima Doll: Kouto Tantei, the closest matches are Steins;Gate: Linear Bounded Phenogram, Clannad, Prima Doll: Fuyuzora Hanabi/Sekka Monyou, Life of Delta and Toaru Kagaku no Railgun. All 6 share its visual novel genre and are ranked by how closely their themes and modes overlap.