Games like Bokuten: Why I Became an Angel

If you finished Bokuten: Why I Became an Angel, the closest matches are The Fruit of Grisaia, Aokana: Four Rhythms Across the Blue, If My Heart Had Wings, Sono Hanabira ni Kuchizuke wo: Michael no Otome-tachi and Making Lovers. All 6 share its adventure genre and are ranked by how closely their themes and modes overlap.