The Incubus System - Chapter 16: Complicated

What happens when a scientist from a futuristic world reincarnates in a World of Magic and Knights? An awesome MC is what happens! A scientist’s goal is to explore the secrets of the universe, and this is exactly what Leylin sets out to do when he is reincarnated. Dark, cold and calculating, he makes use of all his resources as he sets off on his adventures to meet his goal. Face? Who needs that… Hmmm… that guy seems too powerful for me to take on now… I better keep a low profile for now. You want me to help you? Sure… but what benefit can I get out of it? Nothing? Bye. Hmmm… that guy looks like he might cause me problems in the future. Should I let him off for now and let him grow into someone that can threaten me….. Nahhh. *kill*-

Alternative: Leylin is transported from an advanced technological era into a medieval world— except there’s magic. Equipped with “only” his quick wits and an A.I. chip fused to his soul, he sets out to become the most powerful magus the world has ever known. In a land divided into the Light and Dark Magi, the weak can either be cattle or disposable slaves. Only the strong can determine their lives, and only they have the luxury for virtue. Yet strength is only a tool for Leylin, like any other. His goal, in the end, is his own.

Hamel, a warrior who traveled with his colleagues to exterminate the devil. Yet, he died just before the battle with the devil started.

“Yes.”

What the hell?

He was reborn as the descendant of his fellow warrior, Vermouth.

The descendant from the bloodline of the great Vermouth, Hamel. No, he was now Eugene Lionhart.

“It was already enough me having the delusion that I was a genius in my past life. But… this… It’s… It’s incomparable.’

From a dying body to a new body, he has the achievement that he did not have in his previous life.

And, a reincarnation of an unknown origin, the reality of living together with the demons.

Facing a new world where everything is questionable.

The journey of the unfinished previous life begins with Eugene’s body.

Travel through the world of Naruto, activate the god-level forging system, and a super strong man has risen in the ninja world!

One after another artifact appeared in the ninja world one after another,

So the whole world is boiling!

Grass Pheasant Sword, Ten Fist Sword, One Hit Kill – Murasame!

The beheading sword, the Zanpakutō, the flowing blade is like fire・d solution!

Red Sand Scorpion: “My puppet is not worth mentioning in front of his ninja gear!”

Four Raikage: “What?

He can slash through my Thunder Dun armor with a single knife? ! ”

Madara Uchiha: “I can’t even beat his ninja gear. What kind of fourth ninja war is going on?”

- Description from novelbuddy

I became an extra who confessed to the main character in a female-oriented romance novel but was rejected – an embarrassing history. However, I tried to brush it off as no big deal, until… “…Didn’t you say you liked me?” After you rejected me, why are you now clinging to me…?