Manga written by Mangaka Kumano Genkotsu:
https://twitter.com/kumano_knuckle
Last Boss-tachi no Kakushigo
Reincarnated into the Demon King's castle?! Magic developed using programming skills! And even the Demon Kings recognize that magic——? ___ **Alt Official Raw:** [niconico Manga](https://manga.nicovideo.jp/comic/68401)
Chapter 17
6 months ago
Action
Isekai
Fantasy