Quick Transmigration: A Game of Winning the Male Lead

Looking for a Quick Transmigration Novel Where the Heroine Uses Cunning Strategies to Win Over the Original Male Lead, with Happy Endings in Each World

No love at first sight or male leads who fall for the heroine on their own. The mission isn't to win him over, but she ends up doing it by accident. I want the heroine to consciously and methodically pursue him, with the male lead gradually falling for her. Don't have her pursue the villain or a supporting male character; she should pursue the original male lead. No bad endings for the small-world arcs. I want a happy ending.

Quick Transmigration from a Male Lead’s POV: He Pursues and Saves the Female Lead

Looking for Sweet Quick Transmigration Romance! So Sweet, With Absolutely No Angst!!!

Ideally, the male lead falls in love with the heroine at first sight!!

Looking for a Quick Transmigration Novel: A Heartthrob Who Takes the Plot Seriously

In one of the worlds, the heroine pretends to be a lovesick fangirl while secretly taking pictures of and following the male lead. She works at a shop and snaps photos of him there, thinking she’s doing a great job of hiding it, but he figured it out long ago. Every day, he deliberately strikes poses for her. A kind coworker warns him, but he tells them not to say a word.

Please Recommend Some Quick Transmigration Novels!!!

Are there any stories about conquering the male lead or male supporting characters, or a female supporting character making a comeback, where the female lead is a mermaid in one of the worlds!!!