Third-grade elementary school student Mi has many troubles and wishes. As he made a wish alone under the starry sky, it was overheard by Ayu, a meteor-like alien who happened to be passing by. Ayu possesses the ability to travel instantly between planets and can help others fulfill various wishes. Mi brings Ayu home as a companion. From then on, the life of third-grade elementary school student Mi becomes extraordinary. With his superpowers, Ayu travels across the universe, continuously helping Mi realize all kinds of little wishes.