Sign-In System at the Start

(This is a feel-good power fantasy, the kind where the more satisfying, the better. Don't compare it to reality; it's a parallel world, with one female lead, one female lead, one female lead. Important things should be said three times.)

From the start, a sign-in rewards me with a financial district that brings in 20 billion in rent each year.

Have I finally reached the peak of life?

Ding! Sign-in successful. You are now the fiancé of the heiress to Tianlong Group.

"What? I can even sign in for a billionaire wife?"