Yû Nakahara

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.

To all his schoolmates, Jin comes across as a hot-headed class clown from typically barging in late and sleeping the whole way through to always responding to any situation with reckless stupidity. The fact that he used to be the charismatic leader of a legendary biker gang has turned into an urban legend; however, after starting a rivalry with the captain of the school baseball team, he and two former members, become their star players. But it's not long before his past catches up to him...