This is the magic academy of a certain country, Paiots Magic Academy...
The incompetent magic teacher, Charms, spends his days being scorned by his students once again.
"Am I going to end my life like this... not only failing to accomplish anything, but
being ridiculed by people forever...?"
As he was lost in thought, he noticed a hidden room behind a bookshelf...

As he went further, he found a suspicious room with a suspicious book...
Is this... a forbidden book containing ancient taboo magic...??
Hesitantly, he reached for the forbidden book, and a sealed succubus jumped out!