MTL - Naruto: I Became Naruto’s Blackened Personality - Chapter 23

A striking man of mysterious origin and peerless talent, he looks back at the world, in all its entirety, with utter disdain. And yet, in the treacherous and unpredictable ultimate formation of the Boundless Secular World, he guards a breathtaking ancient qin with broken strings, waiting silently for the destined one to arrive!

A boy encounters him, and knows for the first time that the world beneath the Heavens is a fickle place. Not even demons, devils, ghosts and monsters can match the frivolity of human nature!

A slender physique, and jade-like beauty, but the sword that strikes between heaven and earth is not unlike a streaming rainbow!

The vastness of the starry sky, the seven emotions and six desires! Greed, anger and ignorance! The teachings of Buddha will grant you boundless strength!

A sea of blood will come, at the cost of all mortal beings full of honest hope!

The ghosts wail as the gods roar, but the sea of blood has no end!

Where, pray tell, is the path I should take?

Since there is no path, no matter how bitter and bloody the sea, even if my boat is made out of bones, I will soar to the heavens above!

- Description from Novelupdates

Warning: Many, like way many lemons and smuts. C'mon guys, you know it's gonna be a good one there's no need to read the synopsis and everything down here, but for context, you can go on but the potential is the first ten chapters, it won't hurt to give it a go, just try it and then thank me later, oh, I will be the one to thank you I guess. See you on the other side.Let's gooooInfinity Money and Endless Smut, lemons. Only the good goode things...___Peter Carter is a 16-year-old orphaned virgin nerd who gets bullied daily at Lincoln High. His escort mother died at birth, he lives with his nurse mom and twin sisters, and his biggest achievement is surviving lunch without getting his ass kicked by quarterback Jack Morrison.___Human! That's what I fucking was. Me and Tommy were bottom-tier NPCs in everyone else's highlight reel. All I did was study and jack off to porn, fantasizing about women I'd never touch—Madison Torres, Mrs. Rodriguez, Sofia Delgado. They existed in a universe where I didn't even register as human.But then everything changed.[DING! You have Awakened the Dark Lord Seduction System!]A system born from the sexual frustration of hundreds of thousands if not billions of women worldwide, my mission was clear: liberate sexually neglected wives, daughters, unsatisfied hot students, my gym instructor, CEOs, frustrated teachers, and touch-starved women while earning System Points that convert to real money (1 SP = $100).[DING! Abilities gained: Magical Fingers, enhanced stats, master-level skills...... Advanced Knowledge downloaded: Master Driving, Massage God, Advanced IT...]The system transformed me from school punching bag to irresistible seductive Dark Lord. Every intimate milestone earns SP—from first kisses to full encounters, cucking husbands saving their neglected wives, widows, wives and mistresses of billionaires while walking on the tight edge of seduction and eventual death if I got discovered by these rich guys I was helping satisfy the wives they'd neglected.Now I'm living a double life: shy nerd by day, dominant seducer by night, making bank while giving desperate women what they've been missing.From bottom-tier loser to supernatural playboy. I turn these neglected women into my women, mine alone as we unleash our hidden desires and forbidden intimacies.

500 years ago, Chen Xi was devoured by a crack in the void and was transported into a cultivation world.

500 years later, he returned back to Earth after enduring through several hardships and discovered that only 5 years had gone by.

…

In the courtyard, beauty at the side, a candle flame wavering.

A gush of clear wind, half a full moon, the peach tree remains unchanging.

…

Wait, whose kid is this?! Why is she calling me papa? Gazing at the little girl in front of him with skin as pale as jade, Chen Xi froze.

…

　
Returning home from cultivation, starting as a stay-at-home dad.

In this life, not fighting to be a king nor claiming to be a tyrant, only praying to peacefully be a wife-pampering mad devil and a child-protecting daddy!

- Description from Novelupdates

A spin-off of Lillia and Treize, Meg and Seron is a high school adventure/mystery/romance/comedy of sorts taking place in the rough equivalent of the 1950s. The story follows Seron, a stoic and handsome bookworm who is in love with his classmate–a sweet, oblivious transfer student named Meg.

Meg and Seron takes place at around the same time as Lillia and Treize, but knowledge of the main series is not necessary to read Meg and Seron.