Teruaki rushes back to his parents' home when he hears that his father has fallen ill. However, this turns out to be a lie just to get Teruaki back home. Teruaki's father wants Teruaki to quit the GGF and the divide between him and Teruaki grows further. This is when they hear strange chirping from insects. Apparently, the quality of the soil in the fields has changed over the past month and the crops are dying. As Teruaki and his father go around, they find a strange cave in the mountains...

The fifth flight test of the Earth Garon Mod. 3 begins with Yasunobu as the pilot and Anri in the commander's seat. They reach the maximum speed of Mach 9 during aerial combat maneuvering. However, Yasunobu is unable to withstand the gravitational acceleration and loses consciousness. Because of this, he is discharged as the pilot of Mod. 3. In the meantime, a gigantic Deltandal appears, and Anri and Earthy are forced to pilot Earth Garon.