Games like Natsuzora no Perseus

If you finished Natsuzora no Perseus, the closest matches are Fate/Stay Night, Artificial Academy 2, Porno Studio Tycoon, Twins of the Pasture and Miai Kekkon Shita Osanazuma ga Otoko no Ko Datta Ken. All 6 share its visual novel genre and are ranked by how closely their themes and modes overlap.