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?!

Seiran has been kidnapped, and the seal placed on the Demon Lord is breaking! Anise must make a True Contract with her knights in order to save Seiran and stop the Demon Lord from entering this world. But is Anise ready to accept the terms of this new contract with her knights?