Anise Yamamoto has been told that if she ever removes the rose choker given to her by her father, a terrible punishment will befall her. Unfortunately she loses that choker when a bat-like being falls from the sky and hits her. Anise is granted four cards representing four knights whom she can summon with a kiss. But now that she has these gorgeous men at her beck and call, what exactly is her quest?!

High school student Anise Yamamoto is the "Rose Princess" who commands four handsome knights. She is quickly trying to fix the Demon Lord's seal to free herself and her knights from the Rose Contract that binds them to her. Her knights have entered a boy-band contest to win a mysterious Arcana Card, but do they have what it takes to be idols?!