The Abandoned Reincarnation Sage v01-04 [Hanashi Media] [Oak]

https://hanashi.media/the-abandoned-reincarnation-sage-building-a-mighty-empire-of-monsters-within-the-monsters-forest/
https://store.hanashi.media/book-series/the-abandoned-reincarnation-sage/

Notice:
I've stripped away the subtitles from the filenames as Hanashi Media can't seem to quite figure out how to write the subtitle...

• Volume 1: Building a Mighty Empire With Monsters Within the Monsters’ Forest
• Volume 2: Building a Mighty Empire With Monsters Within the Monsters Forest
• Volume 3: Building a Mighty Empire of Monsters Within the Monsters’ Forest
• Volume 4: Building a Mighty Empire of Monsters Within the Monsters’ Forest

...or well they seem to have figured it out now, waiting to see what the other volumes end up with before readding them.

Other Hanashi Media books.