Heaven's Greatest Professor - Chapter 37 Soul Oath

(Warning Mature Content R-18)After a catastrophic plane crash, a group of college students find themselves marooned on a mysterious, uncharted island teeming with an ancient, aphrodisiacal energy. As they adapt to their new reality, the island's seductive influence heightens their libidos, awakening latent powers alongside primal urges of lust, envy, and avarice.Beneath the paradise-like facade, the island proves to be a manipulative prison, thriving on their deepest desires and fears. Survival hinges on more than just overcoming the island's perils; it demands they confront the beasts within, where every alliance is tested by temptation, and every passion could lead to their ultimate downfall.

Yun Woo is the youngest author in history to enter the literature world. His debut work was a massive hit but this success was short lived for the unprepared.

He Lang died by his own hands for the sake of his imperial younger brother’s ambition, whom he loved. He was offered to be reborn in exchange for giving up his past romantic feelings. Reborn without the burden of his romantic feelings, he brings with him a manual to new worlds. He wholeheartedly followed the instructions of the manual to complete the tasks, not knowing that the originally slag gong was blackening…
He pleaded to his affectionate Emperor brother to release him, he pleaded to the paranoid prisoner next door, but until the end he remained baffled.
In the end, he discovered that the full name of the manual was – “Slag Shou Cultivating Manual”
Σ (っ ° ° °;) っ!

- Description from Novelupdates

Welcome to Hell’s Game.[Entering instance: Bloody Restaurant][The position you applied for: Delivery Person][Your customers include: a fat otaku emitting a corpse stench, a maid who bursts at the slightest disagreement...][Your colleagues include: A boss who's too pretty to be human, A cow or a horse in the literal sense, a man-eating tree that swears in French...]Facing these incredible characters, Liu Zheng, who wanted to be a decent person, had no choice but to give up on humanity.