The story starts off with a face-off between two rival heroes, ZET and ALPHAS, and then traces their origins - Jin Kanzaki, a young man with the ability to transform into a superhuman being known as ZET, and Kouga Amagi, a young man with a strong sense of justice who uses technology to fight as ALPHAS. The fates of these two men and those around them intertwine as they fight to protect mankind and destroy monstrous abominations known as Players.
Daisuke Namikawa
Jin Kanzaki (voice)
Romi Park
Jin Kanzaki (young) (voice)
Mariya Ise
Hanako Tanaka (voice)
Mamoru Miyano
Kouga "Alphasz" Amagi (voice)
Yuki Kaida
Kouga "Alphasz" Amagi (young) (voice)
Kana Hanazawa
Konoha Amagi (voice)
Koji Yusa
Seiji "Anvil" Haitani (voice)
