Love Grimoire-The world seems to be destroyed if the strongest virgin hero is married ~ (1-3 volumes)

the publisher:
Author: Inu Yamako
Size: 128mm x 182mm
Number of books: 3
Language: Japanese
Category: Shonen manga, manga
Latest release date: 2021-09-10

Synopsis:
The world's strongest hero is a legendary magic book that anyone can make for a lover!?
The hero defeated the Demon King and sealed it. However, the seal is just a blur.
At the time of resurrection, the brave blood of the hero stands up again. That should be ... the hero is still cherry.
If you do not have a child by the age of 30, it will be a magician!
In order to protect the world, using the love guidebook that has long been transmitted to the elf clan ≪ Love Grimoir ", the marriage hunting for the strongest hero has begun.