In the face of an alien onslaught known as BETA since 1973, Earth relies on Tactical Surface Fighters to combat the threat. Despite valiant efforts, humanity struggles against inevitable defeat, retreating from the Eurasian Continent. In 2001, Imperial Japan grapples with developing advanced TSFs while defending the Far East. The UN proposes a joint project with the US, uniting Yui Takamura and Yuya Bridges, elite pilots on a path that will redefine their destinies. Amidst this high-stakes struggle for survival, the duo's meeting sparks a profound journey of self-discovery, set against the backdrop of creating crucial weapons against the relentless BETA forces. As the battle intensifies, the true cost transcends mere survival—it's a test of courage, sacrifice, and the human spirit.