I'm the Mafia Boss's Woman

Seraphina 'Sera' Bellweather, the beloved daughter of the Prime Minister, marries the Crown Prince to become a Princess, only to be assassinated on her wedding night. In the midst of this life-or-death crisis, Seraphina 'Sera' Bellweather unexpectedly travels to a modern society called the Dragon Kingdom. Before she can adapt to everything before her, she discovers that a man who looks exactly like the Crown Prince is hiding her from a group of thugs. She doesn't understand why she suddenly came here, and how should she return to her own time?