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... N-nice to meet you. I'm Catoblepas...um, do you like anime, manga, or video games? Would you... cosplay together with me? A muscular Transient, who appears to be quite shy. He seems like an anime nerd.