"That night, it was a mistake."

I was the ill-fated duchess, killed by my husband, the final villain and mastermind in the novel. A weak duchess who couldn't even do her job properly.

I planned to divorce him after playing the role of a business-like, show-window couple, but I ended up making a mistake with my soon-to-be ex-husband.

"Do you not remember?"

But from that day on, the Duke started acting even stranger..?

"If you think it was a mistake, let’s check. Do it again."

When I came to my senses, I was already in my husband's arms. And when I realized that his embrace, which I thought was always cold, was actually warm, it was too late to turn back in our relationship.

...Husband, why are you so obsessed when we agreed to divorce?