Valhalla Saga - Chapter 4

Xiao Ran transmigrated to a fantasy world. As a dungeon guard in the Celestial Dungeon, with a special floor called the Purgatory meant for powerful demons and martial arts experts, he faced a huge challenge from the start. The Eldest Princess acquired a forbidden martial arts technique and was banished to the Purgatory. However, no one was powerful enough to restrain her. All the dungeon guards were defeated. Xiao Ran stepped up and declared, “Your Highness, it’s better for you to behave yourself on my territory” and effortlessly subdued the Eldest Princess.

He progressed from imprisoning the Eldest Princess to delivering the Great Xia Kingdom from the evil clutches of various demons and evil martial arts experts.

…

Xiao Ran was the mastermind behind the scenes.

In a world where Beast Tamers command respect and wealth, Kai is nothing but a street rat, scraping by on the streets of Ashenford.Orphaned and despised by townsfolk, he's learned to expect nothing more than cold stares and cruel words.His life takes an unexpected turn when he stumbles across an injured beast deep in the wilderness.Kai nurses the creature, forming an unspoken bond that will alter his fate, and he begins to see the harsh realities of a world ruled by power, status, and secrets.

He is an undead who is devoid of all humanity, he is the one and only supreme overlord, he is a man who has severe mysophobia.

There are many people who try to act cool in front of him, whatever soldier king, assassin, system user, transmigrator, reincarnator, the strong returning, the strong coming down from the mountain, person coming back from the immortal world, reincarnation of the devil king, immortal emperor possessing someone’s body, and so on, all of them do not know what will happen next

- Description from Novelupdates

In a peculiar twist of fate, Lee Taeok, found himself in an extraordinary predicament. Little did he know that his scathing critique of a popular novel, ridiculing its blatant naivety and overly innocent take on romance, would set in motion a perplexing chain of events, ultimately leading to his unexpected rebirth as the delinquent character, Baek Taeyang, from the very same novel.“You should have taken better care of your girlfriend.”In the world of the Academy Sweet Love Diary novel, Baek Taeyang is destined to “rescue” the heroines.