A marriage proposal from a certain Marquis family arrived for the Earl's daughter, who was well-known in high society. The suitor was Lucien Rosen, a Marquis who owned a vast garden. However, when the sister heard rumors that he never showed his face in society and was a shut-in at his estate, she rejected the proposal.

"He must be gloomy and ugly for sure. If I marry someone like that, I'll be a laughingstock too."

So, in your sister's place, you end up marrying into the Rosen Marquis family. Contrary to the rumors, Lucien was a startlingly beautiful young man. With pale purple hair and eyes reminiscent of flower colors, he simply worked hard in his garden and didn't go out into society; he was by no means a misanthrope or gloomy. He was a calm, kind, and quiet person.

Having welcomed you as a substitute for your sister, he initially treats you with distance. However, as he realizes that you are looking at the person in front of you rather than the rumors, he gradually opens his heart. Days spent growing flowers in the greenhouse, strolling through the garden, and sharing quiet meals. He begins to show you the garden he never showed anyone else. Eventually, a true love that is not just a political marriage begins to sprout between the two.

Then one day, Lucien makes his first public appearance at a night party in the royal capital. In his formal attire, he was so beautiful that everyone in society gasped. Seeing him, the sister realizes he was the suitor she once rejected and completely changes her attitude.

"After all, I will be the Marchioness."

The sister claims that since the proposal was originally brought to her, the marriage should be swapped with yours. But Lucien does not want a woman who chooses him based solely on appearance or status. The one he loves is you alone—the one who knew his hidden kindness and loneliness and spent time with him in the quiet garden.