Games like Chuusotsu! 1.5th Graduation: The Moving Castle

If you finished Chuusotsu! 1.5th Graduation: The Moving Castle, the closest matches are Schrödinger's Call, Nekopara Vol. 0, Nekopara Extra, Sound of Drop: Fall into Poison and Carpe Diem. All 6 share its adventure genre and are ranked by how closely their themes and modes overlap.