With Mangekyo, I Escaped Konoha To Other Worlds [Naruto/AttackOnTitan] - Chapter 26 - 23 Kenny Ackerman

The main character Lei Yu does not have the ability to practice his family’s martial arts. He gets stepped on and tossed around. Due to certain reasons, he leaves the family, coincidentally gains an ability, and makes his own path to becoming an immortal.

- Description from Novelupdates

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!

Fang Ze traveled to the world of psychic forensics and activated the detection system.

Since then, the world has gained a crime-solving wizard. In just one year, Fang Ze became the captain of the police force.

Suspicious disappearance cases, corpse dismemberment cases without clues, heinous vampire cases…

With his keen judgment, Fang Ze relied on the assistance of the system to grow all the way.

With the passage of time, Fang Ze suddenly discovered that this world seems to be more than just a psychic forensic doctor…

- Description from novelbuddy

Born as a lowly goblin, Leav refused to accept fate’s cruelty. Through sheer will and tactical brilliance, he clawed his way up—evolving, battling, and commanding monsters who once saw him as nothing. But power comes at a cost. As war rages and enemies lurk in shadows, Leav faces betrayal, brutal losses, and the cold truth—strength alone won’t forge a kingdom. With ancient magic resurfacing and rival factions closing in, can he rise above mere survival and claim true dominion? In a world where the strong rule and the weak perish, Leav must choose: remain a pawn or become a king.