Minami Eru, who enrolled in a private high school. With the elite conglomerate in the background, this high school has a scholarship student system, and if you are selected as a scholarship student, you will be exempted from tuition fees, etc. In addition, there is a very luxurious dormitory dedicated to scholarship students, and all the students longed to become scholarship students. Due to a mistake in dormitory arrangements , Eru is put in the exclusive dormitory. Haruka Kujo, the top student and the president of the student council, was in control of the dormitory . It seems that Haruka Kujo is interested in Eru, but Eru is cold to the scholarship student. I feel a strange atmosphere. There was a male student, Ryudo Kai, who watches over Eru from the shadows. Eru and the Kai remember each other's nostalgia from the first meeting, and Eru is strange about the world. Kai advises Eru not to enter the dormitory again, but never gives a reason. However, Eru is inevitably involved in a number of mysterious cases . . What is the identity of Haruka Kujo,who pulls the strings behind the mysterious cases ...?  And who is Kai...?