The Goddess's Personal Doctor - Chapter 6 - : Iron Buddies

Once a live-in son-in-law, humiliated and looked down upon, he accidentally awakens a heaven-defying Eye Technique.From that moment on, his life takes a drastic turn. With peerless medical skills, x-ray-like vision, unmatched martial arts, and mastery of elixirs, he crushes all enemies in his path.This is the rise of the man they once called worthless—now unstoppable and untouchable.

After breaking up with his girlfriend, he accidentally acquired a genius system and rose from there against the heavens, becoming invincible..

- Description from Novelupdates

Lucas was the last human in the universe.A cosmic-scale war had consumed humanity in massive destruction. As collateral damage, there were no longer any habitable planets. Lucas Alhamera, a scientist, attempted to terraform a planet resembling Earth called Antroseda but continuously failed.Overwhelmed by despair and the crushing weight of loneliness, Lucas attempted to end his own life using a euthanasia capsule. However, just before his life could be taken, he was abruptly awakened by a notification.[As the last of the dominant species, you have been chosen as the new Overseer of this universe.][The cycle of life must continue to preserve balance.][Select planet as the birthplace of the new species (default)][Select another planet...]With the Overseer System he had obtained, Lucas began what he had failed to do for hundreds of years: reviving a dead planet and creating a new race to succeed humanity.

A normal person, Xin Yun, received a second chance by transmigrating to an unknown world. But because he chose to indulge in women, he lost his chance to become the most powerful.

When he gets caught by the force a struggle between the nine most powerful experts, something unbelievable happened, or it could be said that a miracle occurred. Xin Yun was reborn and sent back to the place he had transmigrated over to.

Having been reborn, Xin Yun decided he wanted to become the strongest being together with the three top experts from his previous life: the most beautiful dragon- Sparkling Butterfly, Yi Luo Xiang, the cruel dragon- Evil Empress, Yan Qing Ying, and the most dazzling dragon- Peac*ck King, Ming Xuan!

Furthermore, he wanted to pursue love with the most beloved person from his previous life- Yi Luo Xiang! Xin Yun, making use of his good fortune, used his memories from his previous life to prioritized becoming friends with Yi Luo Xiang, Yan Qing Ying and Ming Xuan. He even received a godly artifact from his previous life- the Heaven Splitting Axe!

- Description from Novelupdates