Light Novel Volume 9

This is the tenth volume of Maō Gakuin no Futekigōsha's light novel series.

Synopsis
The secret behind two goddesses - the goddess of creation and the goddess of destruction!!! The ninth arc: "Mysteries of the Demon King Castle"!

Anos defeated his worst enemy Graham, and avenged the death of his late father. And while he recovered most of the memories lost because of the Erial Creation Stars, something strange happened with Sasha, who was responsible for last of the Creation Stars.

"I am the goddess of destruction Abernyu."

Perhaps due to the effects of the Creation Stars, Sasha has begun to say that she is a reincarnated goddess of destruction. To see if this is true or not, the Anos team begins to investigate the demon king castle through fragments of her revived memories. And then they find traces of the goddess of destruction left all over the castle.

Now the secrets of the two goddesses, the goddess of creation, which create a world and the goddess of destruction, believed to be her sister, will be revealed!!! The ninth arc: "Mysteries of the Demon King Castle"!!!

Keyword

 * Demon King Castle Delsgade: Anos castle 2,000 years ago, which is now used as a school building for the Demon King Academy. In truth, it is the power of, once overthrown by Anos, the goddess of destruction, sealed in the form of the castle.
 * Creation Stars Erial: Stars left by the goddess of creation Militia in which Anos' memories were sealed. There are five in total, but the last one was given to Sasha without ever being revealed. Why Militia has the key to Anos' memories is unknown.
 * Black Sky: A space filled with darkness and starlight far above the earth, above the clouds and the sky. It is a place into which is impossible for beings from earth to enter, where soars the "Gates of God's Realm" which leading to the azure skies of the gods.
 * Gates of God's Realm: A gate leading to the azure skies of the gods, located in the black sky. In the past the gods descent on earth through it, but now it's no longer in use since Anos built the Demon King Castle Delsgade over it.
 * Gods: Extremely powerful race, each representative of which, has some power called "Order". Most of them are devoid of emotions, but among them there are exceptions - the gods possessing a heart.
 * Science temple of age of the gods Everastoanzetta: A sacred castle in the holy city Gaelaheste, which, according to dragonewt, is a gift from the gods. There are many monuments inside it, which diligently deciphered day after day by the temple's students.
 * Spirit of Black Tea Tilmunk: A cup-shaped spirit that turns into black tea if you pour boiling water into it. When you are nervous, this tea has a relaxing aroma, when you are hostile or doubtful it is sweet, and when you are calm it tastes the best - it has taste of wonderful blend of sour with sweet and tangy flavors.