Second season of Bishoujo Yuugi Unit Crane Game Girls.

In the 24th Century, Intergalactic Space Travel has become a reality. One of the first outposts in the far reaches of space is WATCHER'S NEST - an inflation hole drive portal - which has recently come under attack by a mysterious force known simply as GHOUL... A group of young female cadets assigned to the portal are unexpectedly thrown into a hornet's nest of trouble as they finalize their training to become an elite pilot in the Seraphim Squadron. (Source: DVD Collection Back Cover)

It is the year 1995. Earth has been conquered by an alien army from the Saar cluster known as the Akron. The cities of Earth have been destroyed, and the remaining survivors live in harsh shanty towns and villages. Kento, a war orphan, hides within a cave along with his companions in order to escape some bandits. In the cave, they find the secret base of Dr. Earl, who was an inhabitant of the planet Helios, a planet conquered by the Akron. Dr. Earl then fled to Earth, bringing with him the greatest achievement in Helian technology: the super robot Daltanius, whose power is increased when combined with the intelligent lion robot, Beralios. Dr. Earl entrusts the fight for Earth to Kenta, who happens to be a descendant from the long disappeared Helian royal line. (Source: Wikipedia)

The story takes place in the future where war machines from evil mechanical alien empire Garufa finally reaches Earth. In order to protect earth, an Earth defense organization called GEAR (Guard Earth and Advanced Reconnaissance) is formed. GEAR has an ultimate weapon in a form of war mecha, GEAR Fighter Dendoh, which is piloted by two elementary school students, namely Kusanagi Hokuto and Izumo Ginga. Can the friendship between Hokuto and Ginga unleashed the full potential power of Dendoh in order to fight Garufa? (Source: AniDB)