Heaven-Defying Rebel Sage - Chapter 17: Displaying Might with the Horsetail Whisk at Water Curtain Cave

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.

This was the apocalypse. Humanity was at the brink of extinction, all resources were exhausted, and the entire world was in ruins.

Just then, enormous, mysterious black towers appeared in various locations across the globe.

Inside the towers, there were huge amounts of resources. The greater the number of floors of the towers, the more resources it contained. However, corresponding to that, there were also more powerful beasts protecting them.

The only way for one to obtain what he desires is to become stronger and defeat them.

As such, at the demand of the Global Federal Government, teenagers who are of age have to go to the towers to awaken their talents.

Liu yan, who had transmigrated here, awakened the SSS-rank talent: “God-tier Extraction.”

Extract the impurities, and increase the power level of his equipment.

Extract the beasts, and obtain resources to level up.

Until one day, he realized that he could extract the stats and talents of other people…

This marked the beginning of Liu yan’s journey of endless harvesting.

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

After getting forcefully reincarnated into a world of an otome game he has no clue about, the protagonist is then killed and brought back to life by the prideful villainess with one desire.

To rule the world.

As the ruthless girl’s Eternal Servant, how will he dodge the fate that the game system has in store for him?