Neat hero does not work just before human destruction (Volume 1-3)

the publisher:
Author: Tsukikage, Kanetsuki Masato
Size: 128mm x 182mm
Number of books: 3
Language: Japanese
Category: Shonen manga, manga
Latest publication date: 2023-02-10

Synopsis:
This neat is the strongest humanity !!
While human beings headed for the destruction of the demons, the people called the "pioneer" were in a fierce battle with the demons every day to protect the country.
Ferris, the youngest in history, has gained the title of "Brave", who rejected the Demon King.
She, who is the strongest hero, enjoys a secret neat life!?