Dear Prince, Let's End This Adult Relationship: The Prince Who Said I'm "Just a Bedmate" Is Now Doting On Me, Why?!

She awakens to find herself as a "vicious villainess" who attempted assassination and is about to be condemned. Her engagement has been broken off. A man who appears to be a "kind, shining prince" saves her, but he turns out to be the opposite: a rude, forceful man who claims her as his "bed companion." She doesn't remember her past actions, but his gentle actions contradict his cruel words, leaving her confused about his true intentions.
https://www.cmoa.jp/title/336645/