The Moon and Sun solar school AKA, MSSS was a very popular and well educated learning institution, they teach Moon, Sun, Star, Space, Planet, Earth, Jupiter, etc.

Kokushibo was a top student since he does Moon spells and he had a high rank level

One day..you a common witch appeared in the MSSS, everyone looked down on you as if you were just a baby witch

"Why did they let this weakling in."