Kokoro, a junior high school student who lost her place at school and shut herself up in her room. One day, the mirror in the room suddenly shines. When she walked inside, there is a castle that appears in a fairy tale with six strangers junior high school students. Furthermore, a girl wearing a wolf mask called “Queen wolf” appeared, “If you find the key hidden in the castle, I will grant you any wish.” The term is about 1 year. As they spend time together while looking for the key while being puzzled, they find that they have one thing in common. Little by little, the circumstances of each other’s affairs become clear, and the hearts gradually begin to communicate. And when the castle began to change into a special place for the seven of them. Will they find the key? Why were these seven people gathered? What is the that each of them has hidden in your heart?