Takeshi Hongo is a promising young man with a passion for motorcycle racing. However, his dreams are suddenly ruined when he gets kidnapped by Shocker, the evil secret organization planning to dominate the world. After being remodeled into a cyborg, Takeshi escapes and swears to protect the world from the inhuman monsters.

Despite continuing to play in his unsuccessful band, Kohei is surrounded by good friends and a precious girlfriend and so he enjoys a normal life. But "one day" he loses everything. And although he knows he can never get his old life back, he decides to move on by writing a song.