MTL - After 20 Years of Trickery, I Entered the Thriller Game - Chapter 516 : Human beings in captivity.

A great demon king who came from another world to conquer Earth. To save the Earth, Li Luyou could only first take care of this great demon king… a little girl proclaiming herself Her Imperial Princess.

- Description from Novelupdates

A good-for-nothing man married a beautiful girl but was kicked off the bed on the wedding night. Furiously, he wrote a bill of divorce and ran away.
He was schemed a car accident in which he nearly lost his life. However, it turned out to be a blessing. He swallowed the soul that passed through the outer world, thus obtained superb medical skills and martial arts.
Later on, with the silver needles and invincible martial arts, he embarked on the road of counterattacks and was committed to his great dreams.

- Description from Novelupdates

“My name is Shun Satsujin. I'm an orphan… and someone who died only to be reborn into a world filled with fictional stories I once knew.”I expected a cheat ability—something powerful or overpowered. But all I got… was an intense exercise method called Herculess Method and a challenging life.Now, I'm just trying to survive and stay on track.That was the plan—until I enrolled in Shuchiin Academy.And suddenly, I found myself surrounded by girls from anime I used to watch.One by one, they started getting involved with me.