Harry Potter: Eclipse. - Chapter 86:

A dancer who was killed by a serial murderer found himself occupying the body and taking on the life of Brian Morse, a patient with anti-social personality disorder. As Brian, he has the look, he has the brain, he has the charisma, but he also has something that somehow always attracts psychopaths…[The story mentions 3 reality shows and crossovers with the American drama series Dexter. SLASH]

- Description from Novelupdates

He wants indoor plumbing. They think he’s conquering the world.Arthur was a genius engineer on Earth, capable of optimizing global logistics and automating entire factories. But he lacked one thing: common sense. Now, reincarnated as Arthur von Pendelton, the six-year-old son of a powerful Duke in a medieval fantasy world, he faces his greatest challenge yet: Drafts.Armed with the T.E.C.H. Interface (Trans-Epochal Construction Heuristic), Arthur can analyze magic like code and build modern technology from scratch. His goals are simple: Double-glazed windows, hot showers, and a toaster that doesn't burn the bread.But there is a problem. The people of this world don't understand engineering.He builds a high-pressure boiler for a bath; his father thinks it’s a “Dragon-Breath Siege Weapon.”He creates a hydroponic garden; the local church declares him the God of Harvest.He ignores a Princess's flirting to analyze the thread count of her dress; she thinks he is playing “hard to get.”Follow Arthur as he accidentally industrializes a kingdom, terrifies his enemies with home appliances, and remains completely oblivious to the fact that he is becoming the most powerful man in history.All he wanted was a warm bath.

Sophia Alcott, the daughter of Earl Alcott, lives a lonely life as a maligned and infamous shut in, with nothing to do but to work on her skills as a budding apothecary in the dusty storeroom she’s forced to call home.That is until she suddenly wakes up one day and finds herself in the body of an even more infamous villainess (one who actually earned her reputation) locked up in a tower.Although the only clue she has about how this happened is a cryptic note, instead of despairing about her new situation, she’s in awe at just how luxurious the treatment she’s receiving in this ‘prison’ is compared to how she had to live before.Meanwhile, back at Earl Alcott’s mansion, all hell is about to break loose.That’s because…

Humanity's end came without warning when a crimson fog swallowed the sky. Zhao, an ordinary man, watched in horror as a celestial voice declared their fate: their Planet had reached its limit, and its people would now atone for their sins. An otherworldly force crushed resistance, and in an instant, every human was teleported to the Central Land, a vast and hostile realm.The voice from the heavens promised trials that would shatter their wills, but also power beyond imagination for the fortunate. Only those blessed by luck would awaken unique Lord Talents, granting them the means to survive and dominate:In a world where strength lies supreme Zhao will do whatever it takes to get stronger.Zhao awoke in an isolated area near a forest. As despair set in, a voice echoed in his mind:Ding… Million Times Multiplier System has been activated.Just as the rest of the players had known of the world Zhou's subjects were clearing out every resource.When others were building their base he had built a kingdom.And by the time they knew of his threat, HE HAD ALRDY BECOME GOD!