Gaiking: Legend of Daiku-Maryu

In a quiet moment on the ocean, Tsuwabaki Daiya's life changes forever when he and his father encounter a mysterious black fire. From this ominous blaze emerges a colossal creature, leading to the disappearance of his father and crew beneath the waves. Just as Daiya faces his own peril, he is rescued by a magnificent mecha dragon known as Daiku Maryu.

Fast forward five years, and Daiya is now a junior high school student, leading a seemingly normal life until the reemergence of a terrifying monster disrupts his world. This time, he reunites with the mecha dragon, which transforms into the formidable super robot Gaiking. As he pilots Gaiking to confront this new threat, Daiya uncovers a sinister plot aimed at world domination. Determined to protect his home, he embarks on a journey to the distant world of Darius to thwart the impending danger.