My mates in Beastworld - Chapter 1 - Unfamiliar Place

When The Cute Kunoichis Spied on Their Teacher's Secret is a light novel written by Kazuma Kamachi and illustrated by Ryuushi Tajima.

The story takes place in a world where Japan never ended their isolationist phase, and agents from foreign powers are always threatening to steal the country's advanced technology. In order to combat this threat there has been a resurgence of ninjas that use Strategic Martial Arts, techniques that combine cutting-edge modern technology with a traditional foundation of martial arts and ninjutsu. The story follows Souha Sugiyado, a 17-year old ninja instructor and former ninja prodigy who was forced to retire from active duty by the wounds he suffered in his last mission. Souha's four students are all kunoichi who have all gained the rank of Elite Ninja, the highest official rank available to ninja. However, one day two Shogunate ninja approach him with the news that his four students have gone rogue and have stolen a portable modular nuclear reactor, and thus they ask for his help in bringing his students to justice.

In the grand weekend year, demons cause chaos, and people cannot live peacefully.Han Zheng, carrying the game setting he designed [Taotie Furnace], travels to this world. By sacrificing to the furnace, one can break through martial arts techniques.From [White Ape Extended Arm Fist] to [Ape Demon Nine Transformations].From [Vajra Fist] to [Great Vajra Ming King Seal] and then to [Great Mighty Dragon Bodhisattva View].From [True Martial Refinement] to [True Martial Holy Body] and then to [True Martial Indestructible Body]There are no gods in the world, hence demons run rampant, and evil spirits are everywhere.As Han Zheng kills his way through the chaotic world of demons, looking back, he has become the only true god in this world!

With less than a year left before the night of genocide, Uchiha Habara decided to run away.

As a result, he never expected to activate the system that had not been activated for fifteen years, and was kidnapped by the Uchiha clan.

Fortunately, the system is not without rewards, and the stronger Uchiha is, the richer his rewards will be.

So what he can do now is to make Uchiha great again!

- Description from novelbuddy