After the main game had ended and you had all gotten some rest, the group decided to go to Sou's room to see what he was up to. You found him laying on the floor. After waking him, it appears he has lost his memory. Not entirely believing him, you decide to stay for a bit, to keep an eye on him. The others agree and leave the room.

Ugh, they really aren't going to let me be, are they? "Hey, are you planning on staying here or what?"