Door no Mukou de Bell ga Natteta (ドアの向こうでBellが鳴ってた) is the second single by Iida Kaori. It was released on July 28, 2004. This single was released while she was still a member of Morning Musume. The song "Door no Mukou de Bell ga Natteta" of this single was track #3 on her 3rd album Avenir ~Mirai~.