MTL - History’s Strongest Senior Brother - ~ 1775. Three ancestors and two demons

Leon a young man with the heart of a killer, did something unspeakable before getting transmigrated to another world.And what's more? He found out that due to a wish of his, he got transmigrated to the body of an incubus!And he got into the body at the worst possible time!Something happened, he managed to escape death and became the last of his race...he gained the Vice and Valor System,Lewd and immoral act could give Vice point while battle and bravery can give him Valor Point...This world has magic and beauties that none in his previous life can compare.Join the exciting journey of our MC as he gains immense strength and conquers the most gorgeous girls!

In the year 2850, Humanity had advanced so much that what was presumed to be Fantasy, Magic, SCI-FI, or mere imagination was a reality. From 100% efficient renewable energy source to planetary level destruction artillery, and from intergalactic travel to teleportation devices.

It seemed as if technology as it is couldn't get any better, but they were so wrong.

Humanity was searching for signs of Alien life for so long, but what they didn't expect was Aliens finding them first.

A peace treaty was signed between the Humans, and the Yalhvi; who were given residence on Earth as their own planet was destroyed in exchange for knowledge.

The Yalhvi people taught the humans a lot about their research, and how they obtained superpower-like abilities.

Soon the entire Human population was also enjoying the fruits of the Yalhvi Research and knowledge and almost everyone started awakening supernatural abilities.

It can be said that the Earth is filled with opportunity, and wonder but it is quite the opposite.

The influx of one's power lead to bring about a hierarchy system where the one with power has all the say while powerless beings are meant to keep quiet.

This lead to many wars which almost lead to the extinction of the human race, but during the climax of the war; ten brave warriors took a stand and resolved the war.

“We welcome this brand new year with the hope to bring a great change, and to continue progressing forward! Happy New Year 3100, Everyone!” The holographic image of a female spokesperson sounded from every tall skyscraper in Emerald City.

As the artificial fireworks sounded, a boy walking down an alley grunted.

“Humph! A happy new year for the people who have power and money, but it's the same situation for us.” Mako voiced his internal dissatisfaction while continuing to head to his destination.

Only Destiny knew what this year had in store for Mako...

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After being defeated and captured, the dragon-slaying hero Leon became a captive of the Silver Dragon Empress.With a resolve for certain death, Leon unexpectedly turned the tables and successfully imp**gnated the empress on his verge of dying.He thought that this would be enough to let the empress live with shame for the rest of her life and he also fulfilled his duty as a dragon slayer.However, two years later, when Leon opened his eyes, he found a little dragon girl with a tail lying beside him……

This world has Fox Fairies, River Gods, Water Monsters, Great Demons and Cultivators who seek immortality.