KONYAKU HAKI MADE NO 10 NICHIKAN

Description

Arrogant and selfish. Elena Boulder, the daughter of a notorious count, loses her memory in a freak accident shortly after her fiancé, Viscount Oscar West, breaks up with her.

"Elena, there's nothing good about you. I can see that."
"...It's complicated for you to sympathize with her as she is herself."

Oscar is attracted to Elena, who has become a different person than she was before, but she has already decided to break off their engagement.
This is the story of a girlfriend who has completely accepted her breakup, and a boyfriend who can't let go of her now, and the last 10 days of being her fiancé.