The Entire Mankind is Acting As Me, I Shall Secretly Build a Battleship and Shock the World - Chapter 1

A teenager named Evan Mason was reincarnated into the magical world of Harry Potter and goes to school at Hogwarts!
With only his knowledge of the future and great talent for magic, he takes the path towards the top of the magic world, only to realize that ever step he took, changed everything!

- Description from Novelupdates

Zhangsun Zijun and Yi Xichen are the protagonists of the novel “Record of Nine Thousand Vicissitudes.” One is solid and reserved; the other is free-spirited and uninhibited. As fellow disciples under the same master who grew up together, the two have a deep friendship that was strengthened by their numerous life and death adventures together.

However, in a popular yaoi fanfiction, the personalities of these two characters is completely OOC. Zhangsun Zijun turned into an insanely jealous, insatiable s*x addict madly in love with his wife Yi Xichen. Yi Xichen turned into a sweet, delicate little angel. Their daily life was full of kinky bedroom activities…

Suddenly, the Zhangsun Zijun character from the fanfiction was transported into the world of the original novel.

- Description from Novelupdates

This novel is also known as I Possessed a Demon Sovereign

Chen Luoyang felt that something was wrong with his transmigration. After transmigrating, he possessed the body of the highest expert in the world, the Master of the Demon Cult, addressed respectfully as the Demon Sovereign.

Generally, aren’t supreme experts the ones that leave behind a wisp of their soul behind and occupy a new body of some miserable low-level youngster then they go on a journey of revenge and make a comeback?!

Or perhaps it would be transmigrating into a miserable youngster’s body and obtaining a cheat slowly walking the road to becoming a God?

But why did his transmigration seem wrong?

Now my environment is full of big shots and I feel like I’m going to be exposed!

- Description from Novelupdates

For a long time, Malin always felt that Fate had been quite generous to him. Although he had to face that life-threatening job every day, as long as he had the lovely Leopard Girl cooking delicious food for him daily, and as long as there was meat to eat and cats to stroke, life wasn't too unbearable. Working a bit harder and facing some difficulties on the job weren't really an issue for a man.Moreover, being able to live two lives meant one shouldn't have too high demands, right, Mr. Different-Kind?Having said that, and without waiting for an answer, the young man snapped his fingers, and the white flame on his fingertip lit the tobacco in his other hand, then he flicked it towards the non-human entity on the stake.Welcome to Abield, to witness the last splendor of the steampunk era.And the madness.