MTL - Be a Leader In a Primitive Tribe - Chapter 17

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

[Mature novel containing NETORI not NETORARE]Allen wakes up in a new world, but not your average “I’m a hero now” fantasy—nope, this world is full of hot beastkin babes, seductive elves, and spicy situations that he never asked for. With no memory of how he got there, and no clear path to fame or fortune, Allen discovers a few wild abilities that’ll make you squirm in your seat.When he realizes he can make women fall for him with just a few sweet words or the flick of his—well, you get the idea—things get out of hand fast. Turns out, the ladies in this world are more than happy to share their affection with a guy who knows how to use his mouth (and other parts). But there’s a twist. Allen’s mission isn’t just to woo them—he’s taking them.From beastkin to elves, noble women to princesses, Allen’s on a mission to steal them away from their husbands, boyfriends, and anyone else who thinks they’ve got a claim. His skills? Let’s just say they’ll make you blush and beg for more.[MC is not an ugly bastard]

The little princess of the Huo family, one of the wealthiest families, was mistakenly switched out nineteen years ago! The fake heiress is well-educated, talented, and doted on, while the real heiress is an uncontrollable girl who loves to fight, has a strange personality, and had dropped out of school very early…

Xiao Yu, who was a student from modern Earth, accidentally transports to another world and becomes the lord of a territory. Facing an unfavorable situation, he vows to take back his family business, build his new territory, kill all of those who covet his wealth, and dominate the world!