The Day After I Was Cheated On, I Got Married

Blurb:

Zhang Xi is a low-key rich second-generation heiress. Throughout her four years at university, nobody on campus knows her family is loaded. As graduation approaches, her boyfriend follows the trend of becoming a phoenix man and gives her a green hat.

Xue Pan is an elite workaholic, obsessed with starting a business. His girlfriend can't stand being alone and hooks up with his business partner, leaving him with a whole prairie of green.

These two people, green as can be, get drunk at the same bar and have a one-night stand.

The next morning, Zhang Xi wakes up and sees the man lying beside her. Panicking, she says, "I'm sorry, I was wrong. I... I'll take responsibility!"

Xue Pan, equally panicked and robbed of his line, is stunned.

☆★☆★☆★☆★☆★

CEO of a small company (male lead) x well-behaved rich heiress (female lead)

Marriage first, love later.