Games like His Name is Diamond

If you finished His Name is Diamond, the closest matches are Confined with Goddesses, Taffy Tales, Rance 5D: The Lonely Girl, Gay Harem and Aitsu ni Choukyou Sareru to Do-M na Watashi wa Kanjichau. All 7 share its role-playing (rpg) genre and are ranked by how closely their themes and modes overlap.