This Japanese Monogatari Isn't Lame - Chapter 554 - 353. Just in Time (8000 Word Goal Achieved)

He died on the wedding of the girl he had a crush on, after a long and successful career. After convincing Yama to send him back to the world, he decides to fix the areas in which his life went wrong. Realizing the lack of love and romance in his past life, he sets out to conquer the hearts of various women.

- Description from Novelupdates

In the Year 350 of the Anping Dynasty, humans were faced with a huge crisis. Earth was invaded by monsters from another dimension. Fortunately, Su Yu awoke a power where he possessed a scripture that allowed him to contain everything in existence. With that power, he was able to face the coming apocalypse.

The peerless Demon Lord had been reborn. He used a dragon blade to sweep away powerful enemies from every direction and traversed the entire city, attracting countless beauties.