Legend of Swordsman - Chapter 6020 - : Future Self

Traversing into another world, Zhang Xuan finds himself becoming an honorable teacher.

Along with his transcension, a mysterious library appears in his mind.

As long as it is something he has seen, regardless of whether it is a human or an object, a book on its weaknesses will be automatically compiled in the library.

Thus, he becomes formidable.

“Emperor Zhuoyang, why do you detest wearing your underwear so much? As an emperor, can’t you pay a little more attention to your image?”

“Fairy Linglong, you can always look for me if you find yourself unable to sleep at night. I am skilled in lullabies!”

“And you, Demon Lord Qiankun! Can you cut down on the garlic? Are you trying to kill me with that stench?”

This is an incredible story about teachers and students, grooming and guiding the greatest experts in the world!

- Description from Novelupdates

What do you mean by you only accept female disciples?Zhang Yuan glanced at the Emperor of a powerful Dynasty kneeling in front of him and his son, the prince is also kneeling beside him.“Master Yuan, please accept my son as your disciple. I am sure that under your care, my son will reach the pinnacle of the Heavens.”Pinnacle of the Heavens? Zhang Yuan turned his gaze to the so called Prince. Talentless, weak physique and sh!t cultivation technique.Tch, worthless.Zhang Yuan then turned his eyes to another Dynasty Emperor “Master Yuan, please accept my daughter as your disciple.”Seeing the gorgeous woman kneeling in front of him, Zhao Tian smiled faintly.Talentless? I will make you the most talented mortal entity this world has ever seen.Weak physique? I will give you a physique that will break even the limitations of the heavens and earth.Sh!t cultivation technique? Don't worry, choose the best divine technique you want.Sorry but I only accept female disciples!

Yo, Hi! I’m Frank, I made a deal with a demon to pay me some money for receiving a guest for a few days every week.
I had no idea about what I have done.
On May 1st, Conan ‘the God of Death’ came to my house. I was forced to let him in and we get involved in a criminal case.
On May 8th, Bruce Wayne ‘Batman’ came to me. I was forced to follow him to fight crime.
On May 16th, Hannibal Lecter, The Silence of the Lambs, came to my home. I can only say that I really can’t stand my guests.

- Description from Novelupdates

He’s the dream guy of women world wide, the CEO of a formidable mega-corporation. But, he’s absolutely powerless against her, resorting to all kinds of methods to force her into a marriage, tying her to his side with a certficiate.