Li Chuan's Past - Chapter 51.4

A boy from 21st century Earth, met an accident and later was reborn in Naruto’s Ninja World.
He is born in Uchiha Family and becomes the useless brother of Itachi Uchiha and Sasuke Uchiha…. Let’s see how he changed the Naruto world.

- Description from Novelupdates

Thrown into his favorite novel as a powerless extra, he never expected to survive, let alone tame the gods.In a world where strength is everything, chaos reigns and beasts roam the land, including fearsome dragons and gods, the stakes have never been higher.With the power to tame beasts that even gods fear, he must rise above a world on the brink of collapseBut how will he fight for his place in a doomed reality!

At the Edge of the Void…A soft blue light hums, pulsing with energy, its robotic voice ringing with purpose.> “Do you accept me, System 0404, the Harem-Building System?”A young man in his twenties, eyes shining with excitement, eagerly responds:> “YES!”The blue light flares—The universe shifts—The binding process begins—DING!> [System Successfully Bound to…]…Daphne Han???????***System: “If you’re going to RUIN the harem-building mission, I’m not helping you!”Daphne: “Okay, I’ll just win without you.”System: “…Wait, what?”***World one:Male Lead: “Why are my offers disappearing?!”Daphne: “Oh? Maybe you just weren’t talented enough.”System: “YOU CAN’T JUST DELETE THE PROTAGONIST!”Actress #1: “Wait, I actually love acting, not this forced romance subplot?”Actress #2: “Oh wow, working under Daphne is way better than chasing ML’s validation.”Male Lead: “WHERE DID MY HAREM GO?!”System: “DON'T RUIN THE PLOT!”Villainess: “What do you want in return for everything?”Daphne: “You.”System: “NOOOO, SHE’S SUPPOSED TO BE HIS FINAL LOVE INTEREST!”World two:Emperor: “You were supposed to compete for my favor!”Daphne: “Nah. I’m the one with favor now.”Heroine: “Can I join your court instead?”System: “THAT'S NOT HOW HAREM DRAMAS WORK!”***CEO: “I was supposed to be her fate!”Demon Lord: “SHE WAS SUPPOSED TO REDEEM ME!”Imperial Prince: “What do you MEAN she’s not interested in me anymore?!”System: “THIS IS NOT HOW THESE STORIES WORK.”

Childhood sweethearts.
The most popular person in school is my childhood sweetheart.

- Description from Novelupdates