Mild Miura

Hiroya Munakata is the leader of the yakuza group Munakata-gumi. After 10 years since the big fight, Hiroya Munakata's non blood-related younger brother Takashi is released from prison, but Takashi’s daughter, Hyuga says she does not want to meet her father and runs away from home. Hiroya, Takashi and Hiroya’s subordinate Shinya go to Zeni Island where Hyuga is headed to. Something they never expected is waiting for them.

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.