On her eighteenth birthday, at exactly midnight, a girl's life changed forever. Now, the only question is; would she accept the changes and the dangers that comes with it, or go back to the mortal realms... and pretend it never happened? - Welcome to Galaxia Academia, the school for people who are born from a Planetary Guardian and a mortal. Join the journey of Caelestis Yvette Harmonia as her true self slowly gets revealed... as she faces battles, difficulties, friendships, rivalries, and... love.