Title- Kuro no Maou 黒の魔王
Alt eng title- Black demon king/Devil
Author-菱影代理 Hishi Kage Dairi
Status (WN)-501 chapters ongoing
There are also 3 published novels but there are no illustrations available for now.
summary- Kurono Maou is a high school student who is sensitive of his sharp eyes and bad expression. No girlfriend but gifted with friends in his own way, he had been living a peaceful life. But one day, without any reason, Kurono was attacked by a mysterious headache while in the literature clubroom and fainted. When he finally awoke.......Swords & magic, filled with monsters, an orthodox different world summoning.
ncode-n2627t
translation-
here
summary:
here
I liked how it started so I decided to translate it as I read. A bit more serious and sensible than usual Narou series out there.
Cant answer the usual questions as I myself have barely started but as far as I have heard MC is very strong but not OP i.e. there are others stronger than him.
As for harem there are only 2-3 women.
For detailed info wait for Narou veterans
