A mysterious creature of immense size appears in the galaxy, floating out of nowhere and slowly approaching Earth. Suddenly! A mouth opened, and the Earth was unexpectedly swallowed up in an instant, emitting an unknown light - BANG! The Seal explodes! From then on, a planet full of sea otters was born - the Arjaverse! The planet is 75% water, ice, and gems, and its exterior retains the appearance of Earth and the unknown creature, becoming a fantastical illusion. This gave rise to the incredibly cute and unique adventurers - the seal citizens from Arjaverse.