魔王立中ボス養成アカデミア
Rank: 555th, it has 1930 monthly / 40560 total views.
Authors: Uma kanako / Uma kanako
Genres: Manga / Shounen / Action / Comedy / Demons / Fantasy / Isekai / Magic / Martial arts / School life
Direction: Right to Left
Status: Ongoing
Summary:
This is a tale back from the time when humans and demons fought over the world.

The demon king commanded not only common demons, but also, the so called “mid-bosses” with considerable power, which he deployed in strategic positions.

However, these mid-bosses kept getting defeated by the heroes, who continued to grow stronger with time. Which led to the demon king’s army needing to produce even stronger mid-bosses.

It was at that time that a certain demon stepped up.
Demonstrating great wit, she became the demon world’s founder of the official mid-boss training academy !
(WhimSubs)
Resources:
https://comic.pixiv.net/works/4045
https://www.mangaupdates.com/series.html?id=147498
https://myanimelist.net/manga/112973
https://www.amazon.co.jp/dp/B07B9S2XLT