Keiko and Shunpei live near and their relationship is only to say hello. One day, Keiko is introduced him by her friend and she goes to meet him. There she finds him that she knows, so she goes home and introduces herself by a made-up name Nana. Shunpei goes to like her. They just talk on the phone. Finally Keiko tells him that she is Nana and they know they love each other.