Only in this world I know [Level up] (Volume 1-5)

the publisher:
Author: Sho Kakemaru
Size: 128mm x 182mm
Number of books: 5
Language: Japanese
Category: Youth manga, manga
Latest publication date: 2023-11-22

Synopsis:
The reincarnation was the world where humans were managed by monsters as the weakest tribe.
Theo was an S rank adventurer in the previous life.
He reincarnated was a world where the level was set for each race and humans forgot to improve their level.
Theo, who knows the "level up", defeats the monsters that are oppressed by humans and reaches the strongest-!