Classroom of the Elite: Youkoso Jitsuryoku Shijou Shugi no Kyoushitsu e

[Shadow Skill]

Low fanservice levels
No loli
Low fetishism
No sex jokes
You have to understand what characters are saying
No loli
No idol
No loli

-> popularity must not be that high...

Well... when you put it in that perspective... LOL!