I was Caught up in a Hero Summoning, but that World is at Peace (WN) - Chapter 31: Sightseeing For Some Reason

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.

Lucky to be hit in the head by the future learning machine, to obtain future technological knowledge?
How can there be such happiness in the world!

“Future learning machine, future learning machine, give me future knowledge and help me dominate the world!

Sorry, my task is to correct your learning attitude and make you a good kid who loves to read.
Now, please finish your homework.
-Nima! !

This is a little gangster who became a scholar… an inspirational story!
(Technology house upgrade flow!!)

Content tags: system inspirational life modern overhead sweet text

Search keyword: Protagonist: Wei Shuxun, Zhou Quan

Supporting roles: Yan Dongnan, Wei Cheng, Learning Machine ┃ Others: Future Learning Machine, Mission System

- Description from novelbuddy

The strongest Hero in history, Nakamoto Keisuke.

He was summoned to another world in the spring at the age of fifteen years old, and when he successfully defeated The Demon King, he was already thirty-two years old. He had finished his role in another world and returned to Japan, but the reality that had been waiting for him was, “Middle school graduate with seventeen years of blank period” label. He couldn’t find a decent job and had no choice but to spend his days working part-time.

Before such a Nakamoto, a beautiful girl who self-proclaimed had come to return the favor, appeared. “I’m the reward for Hero who had defeated Demon King”, said Angelica, a girl who came from another world that persistently tempted Nakamoto to make her his wife. Together with a high school girl who looks like Elsa, his beloved girl that he lost in another world, Nakamoto with his cheats skills got caught in a harem life.

Accompanied by all kinds of crisis and despair, was the arrival of mankind’s first significant superhero.