Games like Ontei no Ein: Mahou Shikake no Chouritsushi

If you finished Ontei no Ein: Mahou Shikake no Chouritsushi, the closest matches are Project: Gorgon, Forgotton Anne, Degrees of Separation, Planet Alpha and The Liar Princess and the Blind Prince. All 7 share its indie genre and are ranked by how closely their themes and modes overlap.