Alien move frequently between worlds using special portals. However, sometimes unauthorized visitor also use these portals endangering the balance of the worlds. Hence, two Magical Guardians protect each portal and guide everyone back to their world. After Crystal Guardian resigned from her post Joju has to find a new Guardian for the portal connecting four different worlds in Mannheim. Luckily Laura seems to be a good fit and Joju awakes her to become Starlight Guardian - against the wishes of her new partner Raindrop Guardian who thinks she will be useless. Shockingly, he might be right. At least Starlight Guardian seems to unable to use magic!