Global Reincarnation: Only I Know the Plot - Chapter 18:

Han Yoona, reincarnated into the novel 'The Golden Heir' as the heroine of the novel and she lived her new life without complaints… until she’s killed.Her story should have ended there, but Yoona’s soul wakes up in the body of Luzia de Cazadores, the daughter of the kingdom’s most feared villain, Duke Ramiro de Cazadores.Yoona expects a cold, calculating tyrant. What she gets instead is something entirely different.“The author left out crucial details. Too many.” Yoona thinks, trying to figure out how he became the feared villain of the kingdom.As she gets to know Ramiro, she begins to realize that everything she thought she knew about Ramiro might not have been the full story.“Alright then, forget the plot or trying to rewrite everything. I’ll just grant the original Luzia's wish…”But with rival nobles plotting against them and the kingdom still fearing Ramiro’s so-called villainy, To protect her new family and escape the traps of a story she thought she knew, Yoona must outwit it to prevent the original story's outcome.

“I'm one game away from reaching the master rank! I'll do it tomorrow, though. A true gamer knows when to refresh his mind and increase his victory chances!”Adam smiled in anticipation as he went to sleep on this special day.However, he could never have imagined the surreal awakening that awaited him.“What's wrong with my voice?!”“Claws? A tail and horns, too?”[Welcome to the demon realm. You have been selected to reincarnate as a Lord. Conquer this realm of fire and ashes, become its uncontested ruler... or die trying.]Reincarnated as an imp in the cruel demon realm, at the borders of the mythological demon Baal's territory, his life seemed doomed from the start.However, determination sparkled in his eyes as against all odds, he defiantly proclaimed.“No matter who decided to make me start as an imp, watch as I turn into a veritable devil. Even Baal won't hold a candle against me in the future!”Equipped with his unique talent, he started his lord's journey, ready to evolve and prove to those strange realms that demons were more than violent and deceptive creatures... at least he would try.

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

What is a genius? Capable of comprehending any battle skill regardless of the skill itself and sweeping away the bottlenecks while cultivating a new technique; this is a true genius! He Yiming was originally an ordinary youngster in the He family’s estate with not too extraordinary aptitude in learning martial arts.