Isekai Cheat Breakers

Isekai Cheat Breakers (異世界チートブレイカーズ, Isekai Chīto Bureikāzu) is a Japanese manga series written by Kouta Amana and illustrated by Yuuchan Sasaki.

Plot
The "Isekai Trippers" who came from another world brought unprecedented prosperity to the Kingdom of Rosenia, using the cheat skills given by the goddess and the scientific knowledge of the earth. However, behind this prosperity, the kingdom was effectively ruled by people from another world, and many of its citizens were sacrificed...

In order to change the situation, the first princess of the Kingdom of Rosenia, Lia, visits an isolated island by herself to rely on a real hero who once defeated the Demon King!

This is the start of a tale of a heroic rehabilitation of the world, in which the evil and treacherous isekai people with cheat abilities are defeated!