Bleach World Class (also known as Spirits 101)

The classroom was fairly large, it was about the size of a school auditorium, had no desks nor chairs which forced students who took the class to sit on the floor. The classroom had a blue tinge to it due to the large mass of reishi or spirit particles that has long since been infused with classroom's interior over the years the class has been taught in the school. Small orbs of light hovered all across the room or that is what it seemed to new students in the class. Over the time, they would see the true form of the orbs, the ghosts of many humans whose time has long since passed and if they gained enough knowledge to see the ghosts, they would see the other guests in the room; a small collection of low ranked hollows which are scattered across the room that naruhi painstakingly captured alive, after all, nothing prepares you for a hollow attack like the real thing. Of course, naruhi's spiritual pressure and the pressure of the students themselves is enough that the hollow dont cause trouble during lectures but there are times when one brave hollow tries to eat somebody, for the most part, they're harmless though.

Naruhi hovered in the air using his reiatsu as he made sure the classroom was ready for his next class. "I hope this class does well this semster"