MTL - Rebirth of the Super Thief - Chapter 356 :anger

Intellectual Villages are old fashioned rural villages recreated with cutting edge technology. Those villages attract the Japanese monsters known as Youkai.

The high school boy Jinnai Shinobu lives in one of those villages and has a Zashiki Warashi living in his house. He tends to run across Youkai with unnerving frequency and this often leads to trouble for him.

A tree of 10,000 flowers, the world is the door.
The spells change a lot, but the hearts of the people are unchanged.

- Description from Uukanshu translation

Welcome to Freia. A continent where evil magi ruled. Until firearms came, that is. Now the people live free of those demons…

More, however, must lurk beneath the surface.

Claude, a transmigrator from another world, finds himself in the midst of this changing world, attending ‘middle school’. Or, as he calls it, ‘boot camp’. His destiny was to graduate and join the military, but the future is seldom so simple.

His life, and the world, is set on the path of upheaval and chaos the day he finds a cookbook.

A magical cookbook.

- Description from novelupdates

He, since childhood, had followed the Foreigner to practice the Defying Heaven Art, entering the most secretive special forces and becoming a fearsome assassin that made others tremble at the mere mention of his name. After a single failure, he took early retirement, but he ended up as the personal bodyguard for a rich heiress, a school beauty. Accidentally provoking some mysterious Cultivators, he gradually unveiled a hidden world of Cultivation beyond the mortal realm...