Phi Brain: Kami no Puzzle - Shukuteki! Rätsel-hen EP12 - Is That What You Thought I’d Say?

After discovering some puzzles in South America, along with a ring left behind by Raetsel, Kaito's group soon come up against Herbert, who has equipped himself with four replica rings. He challenges the group to use their own weight to determine a balancing puzzle. After some initial confusion, Kaito manages to figure out the puzzle's hidden gimmick and solve it. As Kaito urges Herbert to throw away the rings, Herbert finds himself at odds with his own conscience, eventually finding the power within himself to break free of the rings. After Herbert inadvertently sets his own trap on himself, the group head towards the Andes.