I Became the Female Lead's Foil, So First I'll Take Back My Portable Space

[Period Setting + Transmigrate Into a Book + Pocket Dimension + Foil Character + 1v1 + Mutual Devotion]

When Lu Wei woke up, she had transmigrated into a period novel as the female lead's foil character.

In the story, she stole the female lead's marriage match and job, and even signed the female lead up to go to the countryside.

But then her in-laws despised her for being infertile, and her family rejected her for scheming against her sisters.

In the end, she got divorced and died miserably beneath a bridge.

The female lead, meanwhile, gained a pocket dimension and a spirit spring, made her way in the black market, and rescued an army officer.

With wealth in one hand and love in the other, she had a picture-perfect life.

But...

Why was the female lead's pocket dimension actually a keepsake from the foil character's late mother?

Never mind. She'd take it back first.

Now that she had a pocket dimension, why follow the plot at all?

But why was a certain high-IQ genius second male lead no longer orbiting the female lead, and instead following her around?

And she couldn't even chase him off.

Considering his stunningly handsome face, she decided to humor him and let him tag along.

But how did following her around end with him following her into bed?

[Looks-obsessed female foil who refuses to be a disposable foil character vs. high-IQ genius second male lead who refuses to follow the plot]

P.S. The second male lead does not like the original female lead! He does not like the original female lead! He does not like the original female lead! Important things must be said three times!!!