Naoko meets Yusuke while staying on an island for medical treatment. Yusuke's graceful athletic figure captivates her eyes and she falls in love with him. But their relationship is soon broken after Yusuke's father dies while trying to save Naoko from drowning. The memory of Yusuke leads Naoko to the track, and six years later, they meet each other again at a Marathon competition. Naoko decides to become a manager to help Yusuke, a gifted runner, and they embark on training together to heal their sorrows from the past.
| Actor | Role |
|---|---|
 Juri UenoNaoko Shinomiya | Naoko Shinomiya |
 Haruma MiuraYusuke Iki | Yusuke Iki |
 Tsurube ShofukuteiTensen Nishiura | Tensen Nishiura |
 Aimi SatsukawaYuki Yoshizawa | Yuki Yoshizawa |
 Tokio EmotoKimiyasu Okuda | Kimiyasu Okuda |
 Go AyanoSusumu Kuroda | Susumu Kuroda |
 Soran TamotoYoshizaki | Yoshizaki |
 Nanami FujimotoNaoko Shinomiya (12 yrs old) | Naoko Shinomiya (12 yrs old) |
 Kaoru OkunukiKazuko Iki | Kazuko Iki |
| TTakeshi SatoNobuyuki Goto | Nobuyuki Goto |
 Yorie YamashitaKanako Shinomiya | Kanako Shinomiya |
 Ken MitsuishiNaoko's father | Naoko's father |
 Kyusaku ShimadaNot listed | Not listed |
 Kazuhito TomikawaNot listed | Not listed |
 Rieko MiyamotoNot listed | Not listed |