'Muv-Luv Alternative: Total Eclipse: Part 1' On the verge of extinction, humans are caught in a fight for survival. In 1967 the sudden arrival of a hostile alien race known as BETA has seen the world thrown to ruins in the midst of a Space War. Relying on their last line of defence, a new humanoid weapon known as a Tactical Surface Fighter, humanity struggles to maintain their ground. But hope might be here as two pilots - Yui Takamura of the Imperial Royal Guards of Japan and Yuuya Bridges of the US Army - head to Alaska to be a part of Project Prominence. Will this mission finally hold the solution to defeat the BETA once and for all?