The Last Magic Apprentice

The ancestral ring turns out to be the key to the mysterious magic school. Then by mistake, Equation became the physics teacher of "Beyond Middle School". As time went by, he gradually discovered that this middle school was not an ordinary school, and the students here were not ordinary students. The fat man, who weighs more than two hundred kilograms, can float in the air at any time. The glacier goddess who is as cold as frost will burst into flames when she is angry... All of this is happening in this middle school, and where should the equation go?