Gekitotsu no Hexennacht - Volume 1, Chapter 4: Smile to the Moon

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

"Locke transmigrated into an era where everyone had Battle Beasts. Daemons were rampant and humans were forced to build walls around their dwellings while depending on Beastmasters to keep those monsters at bay.

Arthur got randomly transported to another world. Some people would find that terrifying, but not for him, who was tired of his old life; it was an opportunity.

And, after having bad luck all his life, the tide changed.

It was a world of magic where wizards fought side-by-side with their familiars. Arthur got summoned to be one of these so-called familiars.

He was furious. The thought of becoming a pet was not something he liked. Well, that changed when he saw who his master was.

A hot-woman. And, to make everything better, Arthur was inside the Frostpeak Magic Academy, which only had women students.

“This is heaven. All familiars are beasts, but I'm different. I'm a good-looking man inside a place filled with hot girls.”

When he thought his luck could not get better, he unlocked a system that helped him with everything. Of course, he used the system for a greater good, like getting girls.