Naruto System in One Piece - Chapter 17: Rasengan

Transmigrated into a cultivation world, reborn as a striking genius with extraordinary talent and a formidable lineage. But there’s a catch—he’s the villain, already pitted against the story’s invincible protagonist.So what? The hero may wield the power of fate, but this villain has a cheat system, taking every advantage with ruthless precision. Witness him defy the heavens, rewrite his destiny, and rise to unparalleled dominance!

In the beginning, when they all thought that she was “he”….

ML #1: We will be brothers for life!

ML #2: This time I’ll reluctantly let you have the #1 seat.

ML #3: I will properly repay royal teacher!

ML #4: Ah Rong is my closest little brother, I trust him.

Afterwards…

MLs: I’m seriously such a fool.

MLs: What do I do, I think I’m gay. I fell in love with my bro/rival/teacher….

Afterwards….

MLs: I’m straight! As straight as steel!

Note:
MC is a girl crossdressing as a boy, she knows how to fight, and naturally possess the gold finger halo from the author.

All the ML(s) is the same person, 1v1, sc, HE

- Description from Novelupdates

The year was 2030 when dungeons descended and wreaked havoc across the world.Fortunately, along with the descent of the dungeons was the awakening of various people obtaining superpowers, allowing the world to barely defend against the worldwide threat.Five years later, Desther, a young man that only wants to watch anime and read online novels, awakened the SSS-Grade Talent, Ultimate Thief, allowing him to steal a target’s attribute in battle and making it his own.However, along with the overpowered talent, was an announcement he wished he never got.[You obtained the title, [Chosen One]][Clear the dungeon or Die!]

The most unlucky woman in the world vs The most mysterious man in the world.A piece of paper declaring a marriage alliance between two enemy families was not her business. Because she would never be picked as the bride anyway.Officer Tai Liwu's bad luck was not just broken heels, exploding cars or birds pooping on her head. It also extended to her dating life--which did not exist. She had resigned herself to a lifetime of arresting bad guys and surviving death with zero romance. But when her sister has a panic attack before walking down the aisle, Tai Liwu is shoved into the bridal hall and told to smile.On the other side of the aisle, City Lord Shen Weijun was dealing with his own disaster: his brother, the intended groom had drugged him, put him in the grooms clothes and bolted! Forced to step in under a false identity, Weijun expects nothing more than a political farce. After all, their families are sworn enemies and this wedding is supposed to be a ceasefire, not a love story.But trouble brews when Weijun finds himself falling for the sharp-tongued police officer who can arrest a pickpocket with one hand and chase after her hat with the other. Pretty soon, he is more interested in kissing her than fearing her bad luck and suspicious intentions.And Liwu, her “bad luck” takes a twist when on her wedding night, she awakens a bad luck system, throwing their lives into chaos.