Are We Still in Love?

As soon as their lives were bound in marriage, Cecilia's husband transformed. Gone was the kind emperor she fell for, replaced with a cruel man hell-bent on ruining the lives of both Cecilia and her dukedom. Trapped in this despair, she takes her own life but is shocked to find herself returned to the day she was married! With escape no longer an option, plots of revenge quickly begin to form.

(Source: Tapas)

Note: First released in English, with the initial eligible release in Japanese followed by Korean, making it a manga by our standards.