Welcome to the Phantom Thieves

You climb to an edge that you can stand on and then you squeeze through the window, you’re in the castle now. You look around the room to see that you can easily enter and exit the castle without being noticed, you head out of the room to see that people have already been here. You look to your right and you see that it goes to the entrance with the P.E. teacher, Kamoshida, telling people in armor orders. You look to the left and see that it leads to a different path deeper into the castle.