私、愛しの王太子様の側室辞めたいんです！

Rosemary lives as the first concubine of Prince Ulysses in the inner palace of the Kingdom of Glenphil.For some reason, she wanted to stop being his concubine, but just then, she was ordered to perform her concubine's duty, the "Blessing Ceremony"!?Rosemary was not recognized as an official concubine due to her age, even though she was the oldest concubine for 10 years. If she completes the "Nighting Ceremony", she will really be unable to leave her inner palace! ?