The video showcases a series of animated characters, including a girl with pigtails and a boy with short hair, who are floating in an underwater environment. They are accompanied by jellyfish and other sea creatures. The characters are dressed in colorful clothing, and the background is a gradient of blue hues, suggesting an underwater setting. The jellyfish are pink with purple tentacles, and the sea creatures include a yellow fish and a purple octopus. The characters appear to be enjoying their time in the water, with the girl and boy both smiling and clapping their hands.