The older sister of a count's family, well-known in high society, received a proposal for a political marriage from a certain Marquis family. The suitor was a Marquis who owned a vast garden—Lucien Rosen. However, upon hearing rumors that he never appeared in society and was a shut-in at his estate, the sister 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 are sent to marry into the Rosen family. Contrary to the rumors, Lucien was a strikingly beautiful young man. He had pale purple hair and eyes that reminded one of the color of flowers. He simply devoted himself to gardening 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 man standing before 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 had never shown to anyone else. Before long, a real love, not just a political marriage, begins to bud between the two of you.

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

"After all, I will be the Marchioness."

She claims that since the proposal was originally for her, she should swap places and marry him. But what Lucien wants is not a woman who chooses him based solely on looks or status. The one he loves is only you—the one who came to know his hidden kindness and loneliness, and spent time with him in his quiet garden.