The Demon King has been watching for a long time (1-5 volumes)

the publisher:
Author: Hiroshi Noda, Masaho Fukushima
Size: 128mm x 182mm
Number of books: 5
Language: Japanese
Category: Youth manga, manga
Latest release date: 2023-11-10

Synopsis:
The Demon King's Brave "Progress" Fantasy Opened!

The work called "Demon King"
I am worried that I am not suitable for myself
Reynolds, a young man of the demons
One day, the worth of life I found.

It is called "defeat the Demon King"
I will do my best towards my dream
To support the girl hero, Erie.

This is the Demon King, who keeps an eye on the hero
It's a story about the push!