Thirteen years after achieving major success with the Indiana Hornets, Gorou Honda's career as a pitcher ended abruptly after sustaining a horrible injury. Inspired by his father, who continued playing baseball despite major setbacks, Gorou plans to restart his baseball career and play in a new position. However, his strong dedication to train has puzzled his family, especially his young daughter Izumi, who is frustrated with the absence of her father from her lives. Faced by another tough obstacle, Gorou once again decides to prove his resolve through his beloved sport.

On the rooftops of Shinjuku, Genichirou Izayoi fought against Levih Rah, a man who sold his soul to obtain demonic powers, and lost. Ten years later, Shinjuku remains a wasteland of demonic energy while the rest of Tokyo remains largely untouched. One day, Genichirou's son, Kyouya, is watching the news when he sees that Japan's beloved prime minister has been attacked by demonic forces. While he lacks confidence in the Nempo powers he inherited from his father, Kyouya is the only one who stands between Levih Rah and the rest of the world. Along with the prime minister's daughter, Sayaka Rama, Kyouya journeys into Shinjuku to see if he can accomplish what his father could not.

13 scientists seek to tap genetic powers by creating a hybrid of man and beast. Years later, 13 of their children are embroiled in a battle to undo their handiwork, while Shinichi, the son of one of the scientists, teams up with Christian super-beings to save the world. (Source: Animevice)

OVA episodes bundled with the 8th and 11th volumes of the manga.