MTL - All People: Combination Division, Synthesize the Undead Army at the Beginning - Chapter 14 oath

Travel through the Naruto world and be reborn as a dried persimmon ghost shark.

“As a dam maintainer, I carry two hundred catties of lime with me, which is very reasonable and reasonable, right?”

“The so-called unlimited physique means that you are in charge of physique, and I am in charge of unlimited.”

I kidnapped and robbed, didn’t pay my debts, beat up the elderly, bullied children, attacked others without telling the truth, and often killed my superiors and employers…

But I know that I am a good ninja.

I have the heart of a bodhisattva, the face of a vajra, and the means of demons. I walk in the darkness of the ninja world, but I pursue a bright future where everyone is like a dragon.

I, the dried persimmon shark, was born a miscellaneous fish, and swore that one day, I would smash this boring world dominated by blood theory.

- Description from novelbuddy

15 years ago the world discovered magic as well as mythical beings (basically beings from various legends) in another dimension. Humankind learned to summon these dangerous mythical beings and use their power to great effect. Seven countries formed contracts with these “mythical beings” and gained their allegiance as a result. The mythical beings will choose their summoners on their 14th birthday and give them a stigma. Schools have been set up to train summoners and magical swordsman (basically bodyguards that give the summoners time to cast their spell) as a result.

15 years later after the finding of magic Kazuki Hayashizaki is chosen as a summoner and given a stigma to indicate that. This is surprising since males aren’t chosen as summoners due to their low amount of mana compared to females. As the first male to be a summoner Kazuki is under a lot of scrutiny by almost everyone.

To complicate matters his sister (who’s a magical swordsman) is against him going into summoner school to train there as a summoner. Because summoners and magical swordsman have a cat mouse thing going on where summoners look down on magical swordsman as inferior so his sister naturally is against him going there. She’ll stop him even if it means going to war.

Kazuki however is determined to thrive in summoner school and has already determined to give it his all. Even if he’s the lowest ranked student (ranked E) and his fellow students intend to demean him he’ll prove himself as the strongest summoner.

He swore that if he was given a second chance to live, he would live his life to the fullest.His life was full of misery but he was reincarnated in the body of the son of the strongest expert in the empire.He had the looks, wealth, and women. He was known as the “Handsome Playboy” and he didn't want to become a righteous protagonist.He awakened a system that can make him strong by making others feel the 7 sins towards him.He will collect many beauties and live to the peak of life.