One Piece: King of the World - Chapter 30 - : Doffy, You Are My Brother!

Su Wan is a Realm Destroyer. She shuttles to different time-spaces using the identity of the “Cannon Fodder Ex-Girlfriend”, dedicated to plotting how to happily tear apart the male protagonist and the female protagonist. –There’s no such thing as protagonists who can’t be torn apart, only Ex-Girlfriends who don’t work hard enough~

- Description from Novelupdates

Zhuang Feng is in his last year of high school, and he’s just moved to the city. He lives with his good-for-nothing cousin, who’s always on business trips falling for get-rich-quick scams, and his Saozi (sister-in-law), who tries to make his life miserable as much as possible. There’s one upside, though; she. is. freaking. hot. But one day, he found a piece of her underwear in the bathroom…. And unfolded a series of events that will turn his life upside down.

- Description from Novelupdates

It is the year 2050, One of the world’s greatest assassins had fallen. Will his successor continue his legacy?

[Factory-Courtyard Life • Face-Slapping Matches • Hidden-Advantage Revenge • Rising Star at Work]Tian Xiang’s fiancé is stolen by her cousin—no big deal, plenty of fish in the sea.Then glowing words appear above the cousin’s head: “Reborn Heroine.”Tian Xiang blinks—she’s inside a 1970s harem-novel world where every character wears a flickering label:Big Villain • Tragic Second Male • White Lotus • Evil Mother-in-Law • Villain #1, #2, #3… and above her own head?“Silly-Sweet Cannon-Fodder.”Well, not anymore.Using her real-life job as a factory-union clerk, Tian Xiang rewrite her life script.She warns the other “harem extras,” sabotages the original male lead, and—oops—earns herself the new tag: “Ultimate Villainess.”The novel insists villains end in ruin.Tian Xiang’s reply: “If I’m going down, we’re all going down.”Meng Cheng’an—once a literal background prop, now upgrading in real time:Background NPC → Major Villain → Obsessed Lover → Yandere Husband → Shamelessly Devoted Spouse.The more chaos Tian Xiang stirs, the faster his labels evolve—until the final tag reads:“Her Partner-in-Crime—For Life.”