Games like Grisaia Phantom Trigger Vol.5.5

If you finished Grisaia Phantom Trigger Vol.5.5, the closest matches are Milk Outside a Bag of Milk Outside a Bag of Milk, Milk Inside a Bag of Milk Inside a Bag of Milk, Along the Edge, The Key to Home and Okuri Inu. All 6 share its adventure genre and are ranked by how closely their themes and modes overlap.