It Seems That I've Slipped Into a Different World. Also, My Gender Has Changed. - Chapter 10: Abundant Learning, during a Castle Tour (Part 1)

Waking up, Kim Hajin finds himself in a familiar world but an unfamiliar body.

The 51st year of Konoha was designated by later generations as “the beginning of reform in the ninja world” and “the first year of Vientiane renewal”.

Orochimaru made an indelible contribution to this.

Because he was haunted by a lamp god.

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After being guided by a traveler who became a lamp god, watch how Orochimaru harvests leeks from the ninja world and walks the road to eternal life.

- Description from novelbuddy

In this world, there exists a throne so exalted, it reigns supreme, governing the fate of all.All the realms of heaven and every race, with countless beings, bow down in submission.Heroes of great worlds vie in a tumultuous struggle, each competing for this highest throne, battling to become the strongest emperor.An unrivaled human prodigy, Ye Chen, succumbs to the most fearsome catastrophe in history only to be reborn. With the memories of his past life, he recommences his cultivation, striving to become an eternal and supreme emperor.Witness the path of rebirth against all odds of a supreme sovereign!!!

*UPDATE: Read the sequel to this novel here:

He doesn’t know why his mind has been transferred into that of a petty thief named Soran within the VRMMO . The new ‘Soran’ though possesses both the body’s previous occupant’s memories and his own. Using his experience as a Legendary Rogue who had reached the apex known as the Realm of Legends, he will now have to survive in this world which had once been a game to him.

Soran will have to grow stronger while avoiding the upcoming dangers and protect his younger sister, Vivian, from the chaotic times which will soon devastate the world. He shall eliminate everything and everyone that threatens them, but perhaps Vivian might not need his protection?

When the demons of the Abyss rise and the gods fall, a massacre will take place across the world.

Divinity has fallen, and evil is surging from beneath.

The Time of Troubles has begun.

- Description from Novelupdates