Hell's Handbook - Chapter 404

One of the top expert killers, tired of endless assassinations and having survived a cruel and suppressed life, decided to escape the world’s strictest assassin organization.

I was a good looking prince when I was reborn, and because I could do indecent things as much as I like, I decided to make a harem while traveling with a beautiful female elf~

A supreme expert in the Immortal World had died, and a strand of his soul returned to its original body on Earth. Tang Xiu discovered with amazement that ten thousand years passed in the Immortal World, yet only a single year passed on Earth.

Ruthlessly betrayed by his lover and trusted friends, Tang Xiu found that his soul went back to his previous body on Earth, and, despite he spent 10,000 years in the Immortal World, just a year has passed on Earth and many things have changed. Having an unsurpassed knowledge, Tang Xiu will protect his loved ones and go back to the Immortal World to take his revenge.

- Description from Novelupdates

Ye Qingyu, since the death of his parents four years ago, has been laughed at by the entire Deer city. Little do people know, he has just been biding his time for the entire four years. With the White Deer academy selection just around the corner, can he shut the mouths of all those who have laughed at him? Join Ye Qingyu in his journey to solve the mystery behind his family’s death and to reclaim the Ye family property! It is fantastic!