Cute Aidoru Chinatsu Miyoshi’s (三佳千夏) existence was a total mystery to me until few days ago, but I can’t blame myself: her short-lived music career was a total failure that came from Hello! Project in its early days.
One more thing. The performance I uploaded is from a live concert called Hello! Project '99 at YOKOHAMA ARENA, which was released in VHS at the time. Even though I only discovered Chinatsu Miyoshi a few days ago, I had this live performance of "Unchain My Heart" hidden in this concert for almost four years. The thing is, since I downloaded it, I only watched Morning Musume.'s performances a couple of times, while ignoring the rest. Shame on me!