A Mastermind? No, I'm just the Live-In Son-in-Law - Chapter 7: Oath

Meng Huaiyin accidentally traveled to another world, and chose to participate in the romance drama because he was penniless.

However, what she didn’t expect was that there was a person who followed her all the way to Lianshan when she just crossed over.

Meng Huaiyin: shivering.jpg

The show just started:

Xiao Nanqi stared at Meng Huaiyin with sharp eyes like a knife, but Meng Huaiyin was so frightened that the melon in his hand dropped.

Barrage:

[He loves her so much, it was love at first sight yyds. ]

[Running in both directions, Grandpa is here. ]

[Woohoo, please lock up the two of you.]

Meng Huaiyin: Excuseme? ?

The love and killing of the dog hero and the dog heroine are daily.

[Come here, they are not human anymore, kick over this bowl of dog food. ]

Xiao Nanqi & Meng Huaiyin: Thank you for the invitation, I am not human 🙂

- Description from novelbuddy

On the surface, he is the aloof and standoffish patriot whose sole purpose is to serve the nation. On the darker side, he is an invincible, powerful and mysterious man.

I, the protagonist, was just an ordinary NEET, but suddenly I was reincarnated as a tiny white snake in a fantasy world where legendary creatures and gods exist. Not only that, but I awakened in a cave as the offspring of a terrifying Medusa Serpent.Armed with only my human knowledge and my indomitable mental strength, I'm forced to use cunning tactics and rapidly evolving skills to survive against far stronger monsters and humans... So begins the survival story of a former shut-in with incredible willpower, living as one of the lowest-ranked beasts in a world of magic!ᆖMusic suddenly started playing in my head.I'd been waiting for this moment for so long.'Snakes! Assemble'....

[sexual content and lemons warning]Warning: Sexual content, lemons, Comedy, MILFs, Genius Mc and his harem.Possessive MC, Large Harem, Capable Harem members, No Conscience towards men, Mc is a Chill guy until anything happens to his women.~×~×~×~×~×~×~×~×~×~×~×~×~Ethan Nocturne always thought he was just a regular guy in a world where everyone awakens superpowers at 18. But when his birthday comes, everything changes. His body feels stronger, his senses sharper, and women—especially the ones around him—start acting strangely, drawn to him in ways he doesn’t understand.Then, the truth hits him—he’s not human. He carries the Incubus Bloodline, the rare male counterpart to a succubus. And his adoptive family? They’re not just powerful superhumans. His stepmother, Lilith Nocturne, is the Succubus Queen, and his three stunning stepsisters are Succubus Princesses—rulers of an entire fantasy planet.But here’s the strangest part—they don’t know what he really is.As Ethan struggles to make sense of his new reality, he learns that the world’s superpowers aren’t as simple as people believe. Fantasy creatures—elves, vampires, dragonkin, and more—aren’t just myths. They’re real. And they’ve been living in secret among humans.Now, they’re appearing in his life, drawn to him for reasons he can’t explain. His bloodline, his awakening, and the system guiding him—it’s all connected to something much bigger.Why have these races stayed hidden for so long? What is the real truth behind superpowers? And why does he feel like his very existence is meant to change everything?With a system pushing him toward his incubus instincts, powerful women from all over the world—and beyond—falling into his orbit, and forces in the shadows watching his every move, Ethan has two choices—fight it or embrace it.But one thing is clear—his life will never be the same again.