Imagine a world where rules aren't a thing, a world where you hang out with your favorite people, a world where you might as well not have to worry about a single thing. Rú considers herself lucky for this, especially since she somehow managed to get out of Earth at a very young age. Now, a few years later, she hangs out with her best friends: Nice, and calm Wanda, rulebreaker Song, and the anxious Finity. Day after day, the group enjoys their precious world. However, after a human kid from earth makes her appearance and as matureness gets to them, so does their friendship, making them drift apart little by little. And now, based on the signs, they will be put to the test when their world is suddenly facing a threat.