Set in the beautiful natural surroundings of Boso Town, Chiba Prefecture, this heartwarming drama depicts the bonds between people connected by letters. Ryuhei Kaieda is a postman who takes pride in delivering letters quickly and reliably. Two years ago, he lost his wife and has been raising his middle school daughter Ayumi Kaieda and elementary school son Teppei on his own, but conflict arises between him and his daughter over her future education.
| Actor | Role |
|---|---|
 Kazushige NagashimaRyuhei Kaieda | Ryuhei Kaieda |
 Kie KitanoAyumi Kaieda | Ayumi Kaieda |
 Sachie HaraNaoko Tsukahara | Naoko Tsukahara |
 Hiroshi InuzukaTeruo Mitsuya | Teruo Mitsuya |
 Kei TaniKaoru Hada | Kaoru Hada |
 Yuko KotegawaNot listed | Not listed |
 Kumiko EndoNot listed | Not listed |
| TTaka HiguchiNot listed | Not listed |
 Noritake KinashiNot listed | Not listed |
 Koyo MaedaNot listed | Not listed |
 Yoko NogiwaSonoko Kinoshita | Sonoko Kinoshita |
| KKoki OgawaNot listed | Not listed |
 Nene OtsukaNot listed | Not listed |
| EErika OkadaNot listed | Not listed |
| NNatsume SanoNot listed | Not listed |
 Naoto TakenakaNot listed | Not listed |
 Ryosei TayamaNot listed | Not listed |