@Manhwalover69 sorry, i know it's kinda a moot point for the manhwa but the story doesn't really take place in the middle ages and people of all classes wore corsets up until the late 19th century/early 20th century haha
i think its contractual because she doesnt really love him yet, or maybe because he said its for her protection. he did say that she could live with whichever man she wanted to