I Dumped My Scumbag Boyfriend on the Day We Got Our Marriage License and Married a Powerful Tycoon

(Marriage first, love later + both are each other's first and only + wholeheartedly devoted to each other)

On the day she gets her marriage certificate, Xia Chu dumps her scumbag boyfriend and impulsively marries a stranger. She plans to marry today and divorce tomorrow, but that very night they start living together.

Her “husband” looks aloof, but he's actually thoughtful and clingy. When he helps her put all kinds of nasty, unreasonable people in their place, he's decisive, ruthless, and precise. If the sky falls, he'll hold it up for her.

Later...

Xia Chu stares at the financial magazine in front of her, deep in thought. Why does the tycoon on the cover look so much like her husband? He also says they were childhood sweethearts, but she doesn't remember that at all.