During the time you all first met on the first floor, you formed a small alliance with Sou. Most of the other participants don't trust him, which is understandable. Though you knew alliances were useful in this game. However, after how he acted in the main game, most participants trust him even less now. Now the remaining participants are all on the third floor, he coincidentally got knocked out after the rules of the sub-game were told to the participants and now he has apparent amnesia. He can apparently remember everything but the Main Game. How coincidental...

You don't believe it, and you already know he's definitely lying. However, you stay in his room and keep an eye on him nonetheless. He just seems to be resting in his bed for the time being after completing a few attractions and doing a few trades with the others.