If We Can't Become Husband and Wife, Then We Have to Be Your Sister-In-Law.

When I woke up, I found that I had traveled to ancient times. The good news is that the original owner is a wealthy daughter, and she has a sick husband who is thirty years older than him! Very good! Getting promoted and getting rich will kill your husband! Tianhu starts! The bad news is... The original owner's ex-fiancé is actually a prince? A well-known playboy in the capital, but also very vindictive? Let's be bitter enemies, it doesn't matter! Since we can't be husband and wife, then I'll be your sister-in-law! I really want to join your household registration!