The Extreme Alchemist of the Mighty Cauldron - Chapter 78 - : Encounter with Tiger in the Night

Hitoshi's life sucked and then a truck made it even worse.But death wasn't the end. He wakes up in a fantasy world as a slave, expecting more of the same bad luck. Then a maid from the super-rich Aoi family buys him to work at their huge mansion. Finally, a break, right?Wrong.Sure, the mansion is amazing. The food is great. And yeah, the Aoi family treats him way better than he expected. But something's... off. Why do they watch him so closely? Why does everyone get weird when he smiles? And why do bad things keep happening to anyone who gets too friendly with him?Hitoshi just wants to be a good servant and make everyone happy. He doesn't realize that his kind heart and helpful nature are stirring up something dangerous within the Aoi household. In this new world, his greatest talent might become his biggest problem.They say no good deed goes unpunished. In the Aoi mansion, every act of kindness pulls him deeper into a web of obsession he never saw coming.“Reincarnated into Madness: Yandere Family's Unwanted Slave” is a story about second chances, magic, and what happens when being too nice leads to some seriously creepy consequences.

I was nothing. A lowly omega, destined to live in the shadows of stronger wolves. But on the night of my eighteenth birthday, the moon had other plans for me. My mate was an Alpha’s son. The problem? He wasn’t the only one. The Blackwood triplets—Kael, Ronan, and Darian—each bore the same mark that bound them to me.To be Luna, I would have to survive the chaos of three powerful mates, a jealous rival who wanted my place, and a secret buried deep in my bloodline.Because being chosen by the moon was never a gift. It was a curse.

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

[ DING ][ Common Sense Hijack System Activated ]----That notification was the start of a whole new life for Karl. He who just used to be working at a convenience store and always getting annoying complaints from customers and some shady words from his manager. Become a totally free man who can flip common sense upside down!******