i playing the game and i found few errors
the first one is that vespar recall skill dont remove the contracted members, as well dont give the ability to save, the same thing when entering the house
there also a few problems with gremory, one which already explained when entering the house gremory ends up with the wrong house, another problem however is that for some reason i cant acess the end of gremory path and face the boss, idk if it cus i teleported back to the house through the portal(which also have the same problem as not removing party members and allowing save) but upon returning there no event playing to allow me to progress the story
so far marcy route is fine, do think the boss a little hard to beat, but not unbeatable.