One Piece: Don't Worry, I'm a Doctor - Chapter 39 - : Speechless

When he was categorised as an Omega at the age of 13, Rong Yi made a tiny little wish. In the future, he wanted to fall in love with a tall, handsome and elegant Alpha whom he could share a romantic love with, then build a blissful family with him and give birth to many cute babies together.

A few years later, he grew into a tall, handsome and elegant Omega and was passionately pursued by countless admirers of the same gender, while all Alphas backed away from him in face of his superiority.

This was not the life he wanted.

He was once a presence in the assassin world that made people tremble at the mere mention, and had retired from the assassin world for many years to live in the mountains with his master, teasing nuns and practicing martial arts every day, leading a leisurely life, having washed away all traces of his murderous aura.However, when the old man asked him to come down the mountain to protect a woman, it gradually tore away the mysterious layers of Ye Qiu's demeanor.His skills were extraordinary, and he possessed a long-lost technique of acupuncture.He was both righteous and evil, attracting countless beauties to fall in love with him.What was even more mysterious was that he had a pair of “Supernatural Insight Eyes,” seeing through everything.

This is a story about Gong Lixin who was the young master of an ancient underground palace in the ancient times. He was raised by his master and forced to partake sexual relationships with numerous people to cultivate his Yin Body. His master who has a Yang Body was going to absorb him after he has reach a level to become stronger. MC refused and killed his master also dying at the same time. Then he transmigrated to the modern time and thinking he will enjoy peaceful life, the end of the world arrived.

Being someone with no special powers except for his martial arts, see how he use his martial arts to dominate the times and find his lovers.

- Description from Novelupdates

The strongest hero of humanity, Kim Sung Bin.