
S01E01 Episode 1
One morning on the train, Shunpei points out that Keiko's slip is showing. A coworker gives her his number. Keiko calls. The two hit it off, and make plans to meet. Keiko recognizes Shunpei from...
Nana, unhappy to be fighting with Taeko, asks Yutaka to help her make up. Keiko and Yutaka meet at a bar. Shumpei shows up, and then Taeko comes, and sees Keiko and Shumpei together. She hesitates, but eventually joins. Keiko and Taeko fight, so the boys suggest they go outside. Keiko finally gets through to Taeko. She says she is going to tell Shumpei about "Nana."
Shumpei sometimes sees his neighbor Keiko, but doesn't think much of her. One of Keiko's friends gives her the phone number of a single guy, but when she calls she recognizes him as Shumpei, and gives him the made up name 'Nana.' When they meet face to face, she pretends not to know him, but through their phone calls, they slowly start to fall in love.