The Billionaire Ex-Boyfriend's Return

Anya used to be a nobody in the workplace, constantly bullied. However, Luke, Anya's ex-boyfriend, suddenly reappeared. Luke had abandoned Anya and disappeared 5 years ago, but unexpectedly, when he reappeared, he had successfully developed a new drug in another country and thus amassed a fortune, and he was going to fulfill his promise to marry Anya.