Kazunari Miyoshi (三好一成, Miyoshi Kazunari) is a member of the Summer Troupe, invited to the audition by the Director. He was originally hired as a graphic designer to create the Mankai Company's website and flyer, but he caught Izumi's eye as someone with potential for acting. Kazunari can be seen as a frivolous and fashionable young man with excellent communication skills. He is easy to talk to and befriends people quickly. To make new friends, and because he had nothing better to do, he later took Izumi's offer and joined as an actor as well.

He shares room 202 with Muku Sakisaka.