The first story, Wings of Light and Darkness, takes place between episodes 43 and 44 of the GaoGaiGar TV anime. In this three-chapter story, a bit of the backstory of Soldato J and Arma is revealed as they come into contact - and conflict! - with one of J's old comrades: the Black Soldato, J-013.
he second story, Evoluder Guy, takes place between the end of the GaoGaiGar TV series and the start of the GaoGaiGar FINAL OAV series. In its five chapters, witness the theft of the new Super Mechanoid - the Fighting King of Braves, GaoFighGar - by the underground global criminal organization, BioNet.