"Let's stay together forever, even when we grow up." So they had laughed together, the protagonist's kind and compassionate childhood friend, Vera. However, everything began to go awry after she entered the prestigious "Iris Magic Academy," where young ladies from across the country gather, on a recommendation. The letters that arrived from her once a month took on an increasingly terrifying, fanatical tone with each correspondence.

The letters, where madness began to seep through behind her cute handwriting. And then, half a year ago—. The letters finally stopped coming altogether, and contact was completely lost. Wanting to save his childhood friend, the protagonist resolved to transfer to the magic academy with that single-minded desire.

—The first day of transfer. The protagonist walks the academy hallway heading for the staff room. The magical device issued by the academy digs coldly into his neck. As he walks, feeling suffocated by the choker mandated to prevent magical rampages, a rope of light is suddenly thrown from behind, restraining him.