MTL - The Puppeteer of Academy City - Chapter 966 Hitomi Shiranui's Despair

Before going to college, an ordinary high school student went to celebrate and got drunk. When he woke up, he found himself in a completely different world. There was a big sect, the approaching sect entrance examination, a slum where his body’s previous owner lived, and a shared memory about a missing young girl.

When he got tangled in a fight with a few punks in this different world, he fell off a cliff and miraculously found himself still alive, with two more voices ringing inside his head. They were Sword Master and Saber Master. In the company of them, he continued to find out more about this whole new world. He took the sect entrance examination, entered the sect, met a strange man in black, and even participated in a major competition of the sect to have a chance to win over his peers!
In this whole new world, he was born again and got to explore the fantastic martial world!

- Description from Novelupdates

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

Life in hell mode was never fun? Was it?***********Being burned alive in a laboratory out of sheer jealousy for he had created the best AI system in the medical world? Oh boy, Damien could assure you that it was not fun. But then again, you never get another chance to feel the slow burn—okay that went dark quickly.Lets take it from the top once again.Damien was sure he had angered someone up in the sky and given his foul mouth that hurled curses worse than a sailor he had very good idea of how it happened.Because if being abandoned in the orphanage was not bad enough, he was stabbed by the very mentor he trusted and followed with closed eyes.But when he found himself waking up in another world— even after death he was not left alone. SMH.The world of beastmen —— he realised that he never knew how difficult hell mode truly was.Surviving in the world of beasts was a challenge in itself.And for Damien who found himself in the body of the discarded crown prince of the Brystoria Empire—With a broken nucleus and mana suppressed by Tartarite nails and used as a weapon of humiliation, it was not a challenge.For Damien, survival in the beast world was like walking on a thin rope, that too on one foot!Fortunately, the AI system that Damien developed as a doctor before his death followed him to this world of beasts. Join Damien in his new quest as he overturns his destiny from being a slave to the king of beasts.

TL Description: Eat The World Tree is about a strange guy, who happens to be extremely curious and unable to stop himself from acting on his curiosity. The MC makes a slight mistake and travels to another world, and must fulfill specific quest or face varying levels of consequences (normally death).