Otori (S01E12)

As the second half of their journey begins, the Peek-A-Boo members reach Miyakojima. While everyone else plunges into the breathtaking ocean, Iori is left out due to not having his diving license. The underwater world dazzles them with its vibrant coral reefs, colorful fish, and graceful sea turtles. However, things take a turn for the worse when the group partakes in the local drinking tradition of PaB-style Otori, transforming their magical experience into a chaotic nightmare.