Prelude to a Nightmare! Revival of Daichi-Maryu!!

Gaiking: Legend of Daiku-Maryu · Episode 26 · “Prelude to a Nightmare! Revival of Daichi-Maryu!!”

A boy, Tsuwabaki Daiya found a black fire in an ocean when he and his father were in a small boat. A big monster came out of the fire, and the father and the crews were disappeared into the sea. When he was about to become the next victim, a large mecka dragon appeared and saved him. 5 years later...