Akira is a lonely middle school boy, ignored by his classmates and bullied by his teacher. He falls in love with the image of a girl on a coffee advertising poster and names her Lunn. Through his "friendship" with Lunn, he gradually finds the strength to pursue his own dreams.
| Actor | Role |
|---|---|
 Saeko ShimazuLunn (voice) | Lunn (voice) |
 Kazuhiko InoueAkira Toyoda (voice) | Akira Toyoda (voice) |
 Kei TomiyamaNanpei Miwa (voice) | Nanpei Miwa (voice) |
 Atsuko MineWife (voice) | Wife (voice) |
 Keaton YamadaMath Teacher (voice) | Math Teacher (voice) |
 Kenichi OgataEnglish Teacher (voice) | English Teacher (voice) |
 Koichi KitamuraJapanese Teacher (voice) | Japanese Teacher (voice) |
 Shozo IizukaAkira's Father (voice) | Akira's Father (voice) |
 Hisako KyodaHousekeeper (voice) | Housekeeper (voice) |
| TTetsuya YamazakiBaseball Club Member A (voice) | Baseball Club Member A (voice) |
 Ken YamaguchiBaseball Club Member B (voice) | Baseball Club Member B (voice) |
 Ryo HorikawaClassmate (voice) | Classmate (voice) |
 Ai SatouGirlfriend (voice) | Girlfriend (voice) |