I Only Need To Attend The Classroom Of The Sage To Level Up!

I Only Need To Attend The Classroom Of The Sage To Level Up! Summary:

I got stronger by going to school. Whether by raising up to Level 2 or Level 99, it’s all the same. Every time the Sage’s magical cla.s.sroom is attended, one can level up! In a world where the average level is 20, by reaching level 999, one can become the strongest!