MTL - The Void Lord’s Path To Planar Conquest - Chapter 238 "Dead" Karthus

When an S-class elite assassin-raised captain of a special ops suicide squad comes home from a high-stakes Africa mission, he finds himself offered something that could potentially set him up for life- a curious assignment that he could use to finally exit his days of war and slaughter.

Then placed into a high-school setting, Lin Yi is tasked by the chairman of a top-tier multi-billion company with bodyguard duty for non-other than his own daughter, a certain little Miss of said high-school.

His enemies, once ranging from drug lords, mafia bosses, political figures, and national leaders, are soon replaced with spoiled kids who happen to have rich papas and mamas, and Lin Yi finds his intense expertise and high-threat skillset misused, and very underwhelmed…

But he does get a harem cast as diverse as his old enemies, so Lin Yi decides that, for the sake of messing around with girls as an invincible entity in a down-leveled environment, leaving his bloody and death-filled war days behind is something he’d definitely want to strive for.

- Description from Novelupdates

The Five Impurities descend into the Mortal World, and demons run rampant.Holding a volume of the “Monster Chronicles,” Song Lin traverses time and descends into the body of a Daoist disciple at a remote Daoist Temple on the frontier.He observes that in this world, the old energy of the Six Heavens still lingers, and Witches and ghostly paths dominate.Demons and ghosts hold official titles, order is lost, and humans and ghosts are thrown into chaos.Heretical paths act with impunity, abandoning truth for falsehood, allowing the proliferation of evil forces.Amidst the suffering of the Mortal World and the devastation of life, Song Lin discovers that he can enter the mythological and supernatural tales recorded in the “Monster Chronicles” to obtain Daoist Skills.Shan Hai’s strange legends, myths, and supernatural tales; Pre-Qin Qi Cultivation, Taiyi in the Chu Territory, Penglai’s Independent Immortals, Lingnan’s Witchcraft, Kunlun Immortal Mountains…Slay the Evil Demons of the heavens, master thousands of Daoist Skills.The endless path of the Immortal Dao, I shall relentlessly pursue it.

The MC (Minato) is a college student who died in a plane crash and was reincarnated in a fantasy world. He was raised alone in the wilderness by his succubus mother, and now he tries to make his way as an adventurer.

For unknown reasons, he finds himself transported to a parallel world's Japan, unexpectedly taking over the body of a soon-to-be high school student who had died accidentally. Surprisingly, he did not inherit any memories. However, the first challenge he faces upon arriving here is a language barrier...Just as he struggles to communicate with his new family, a heavenly voice arrives: the black technology system has been activated, and the initial item—translation konjac—has been distributed.This is the story of someone with above-average intelligence but almost no physical strength in the Classroom of the Supreme Power.