Goddess of Ice; Reborn as Naruto's twin sister - Chapter 31: An Uzumaki Clan Secret

An Hao leaped, thinking she had died, but to her surprise, when she opened her eyes, she found herself back in the year 1985. To live a second life, did she have to endure the abuse of her stepmother and stepsister again, the dislike of her mother-in-law and disdain from her sister-in-law, and the betrayal of her best friend who bravely became the other woman just to slap her in the face and climb the social ladder? Was she supposed to end her miserable life in poverty again? An Hao's answer was, “Eat! Shit! No!” She was determined to make something of herself, to get rich by capitalizing on her knowledge and aim for a well-off life. This time around, she was going to be the protective big sister who reformed her worthless little brother who had died a wretched death, and the virtuous wife to make up for her past neglect of her husband! She wouldn't let this life go to waste in despair! A malicious best friend? Coveting her man? Not a chance! Go hang out wherever it's cool! Cough cough, how did she not realize in her past life that this “Stoic King of Hell” was so indecent. Decent? You've had your fill of decency during the day.

When you were six years old, after watching a martial arts movie, you put your hands into the rice pile and imagined that you were practicing iron sand palm.

When you were seven years old, you were the first to greet a stranger in the new semester, and you felt that you were the diplomatic spokesperson for your class.

When you were eight, you could tell it was your parents coming home just by hearing footsteps, so you thought you had a good ear…

……

What will happen when the fantasy of secondary school when you were young becomes reality?

Ji Ruo stretched his hands into the rice pile—

[Congratulations to the host child for unlocking the achievement of Martial Dao: Iron Palm Mi Nei Shen! 】

[Acquired Martial Skill: Iron Sand Palm (first glimpse of the door)]

[The skill level can be repeatedly obtained by activating the proficiency. Heaven rewards diligence, host children, come on~]

Ji Ruo’s mouth twitched, he felt that his achievement system was not normal.

After thinking about it, Ji Ruo picked up a small wooden stick and walked to the rice field not far away…

……

- Description from novelbuddy

The world was once at war with 10 alternate worlds. This was known as the Concept War and our world won 60 years ago. All of this was concealed so no normal people are aware of this fact in the current time.

After the death of his grandfather, the high-school student Sayama Mikoto is suddenly summoned by the giant corporation IAI. He learns this world is headed for destruction due to the acceleration of the Minus Concepts. To prevent this, negotiations must be undertaken with the survivors of the other parallel worlds so their 10 concepts can be released.

And so Sayama is caught up in the final battle to clean up after the Concept War which left behind so much enmity.

A man who was once called the world strongest agent ended up becoming a teacher after his retirement to train the new generation of agents. After many years of training his disciples, he is killed at the age of 60 by the ploy of a secret organization and was reincarnated in another world with all his past memories.Though he was surprised by the magic and the strange species of that world, he adapted very fast to his condition as a newborn and took advantage of it. He acquired special magic and gained a massive amount of strength thanks to his tight discipline in order to reach his goal: resume his career as a teacher which he left halfway through in his previous life.This is the story of a man who based on the memories and the experiences of his previous life, became a teacher who travels through the world with his new students.