University of Special Charms. The Maestra has no time to be bored

Maria's career is on the rise, the world is being conquered, and contact with demon students is improving. She has a fiancé, although not everything is smooth and easy in their relationship.
«The Maestra's big plans» deliver a crushing blow not only to lazy students, but also to the demonic creature from the Other Side. Who would have thought that this is precisely how one could acquire a pet — horrendous on the outside, loyal to the last breath on the inside.
Everything is going wonderfully, but suddenly new problems and old enemies arise, and every rational being, willingly or unwillingly, becomes a hero, demonstrating strength of spirit. And it is these moments that provide time to reflect and understand who is a friend, who is an enemy, who is a beloved, and who is nobody.
The Maestra has no time to be bored. The enemies are defeated, her personal life is established, and yet the secrets of the past will be unveiled, and familiar strangers will meet by the will of the gods. What will Mariella and Maria choose for themselves? After all, in each of the worlds, there is room for only one of them.