G-Self, Start Up!

Capital Territory is attacked by a squadron of space pirate mobile suits led by Cahill Saint, who wants to rescue the captured Aida. Bellri and his friend Noredo manage to rescue Aida as the structure she was being held in was damaged during the attack. Tasked with piloting the G-Self to repel the pirate attack, Bellri kills Cahill in an act of self-defense as Aida watches.