Due to her shyness, Ruka had longed for a knight in shining armor to awaken her with sweet nothings for 17 years, but her desire remained unfulfilled. Despite this, when rumors of a magical stone that could induce desirable dreams reached her, she found herself intrigued. After experiencing something strange, she used the stone and was transported to a dreamland unlike any other. However, when she awoke, she realized that she had been transported to a realm controlled by Valkyries, far from her familiar surroundings.