Terresia is in danger. Mormo, a Yaoon Defender, has asked Terresia's World Tree to stop the Devourer, a monster that eats world's and absorbs their mana, growing into a bigger monster. It is now my job as a Defender to protect Terrasia. My name is Kai and I will fulfill my role as Defender.

I've just received a Love Letter. It may seem so usual, but not for me. I'm Kagamine Len , the mean, hostile and cold guy of Vocaloid High and I repeat, have just received a love letter. The words were so arranged and finely-written that I decided to gather up every girl in school and try guess who wrote it. Now here I am, pointing out confused and baffled girls and trying to find my ' Writing Cinderella '

:D