Yggdrasil

A muscular purple sea creature and a smaller, tan sea creature with a green headband stand face-to-face underwater, their expressions shifting from angry to shocked as the smaller creature's mouth opens wide in a scream. The scene cuts to a young boy in a red shirt making exaggerated hand gestures and facial expressions, then a second boy in a black tank top appears beside him, both moving their arms in a synchronized, energetic dance against a plain wall. The sequence loops back to the two sea creatures, their expressions now more intense, with the smaller creature looking distressed.