On a somewhat peaceful evening, you decide to try summoning a Transient. Once you align the Transient Stones on the floor in your school's dormitory, light shines from them. Recomposing yourself from the flash, you open your eyes and see... I'm Ose, code name 57. Ah, with such a cute, lovely boss, this business might be a bit of fun! Hello, boss, or should I say, Summoner?

A leopard Transient appears in front of you. He's got both a mysterious and seductive air to him, you're on edge.