MTL - Princess Medical Doctor - ~ On-board announcement:

Jang Joonbum started stream to enjoy an easy life.

“From my viewpoint, this so-called supreme bastard’s body will serve as a valuable asset to simplify my life.”Dane was a carefree slacker until a deadly virus turned humanity into flesh-eating monsters—his own roommate included. After being devoured, he mysteriously awakens inside a simulated LitRPG world as a hidden extra, far stronger than the protagonist. Gifted with Adaptation and a heavenly beast, he rises through Soul Academy, defying expectations. However, a mysterious hindrance threatens his newfound power, forcing him to fight for survival.‘…One… Two… Three… Wake up!’

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