Synopsis: Gavan Infinity: Underground Fortress

Episode 4 – “Underground Fortress” (March 8, 2026)

A series of mysterious disappearances are linked to an underground facility on Sigma 3302. Reiji meets a junior investigator named Arimoto and his partner Shoko, who are hunting a criminal using a massive excavation drill called Ground Earth to seize control of the world.

With the help of Shoko’s quick thinking, Reiji docks a new drill unit with his ship to form Cosmo Gavarion WK-2. Arimoto also steps into the fray, transforming into Gavan Ameise to help Reiji dismantle the subterranean fortress.