The BETA have invaded Japan, and are advancing on Kyoto.  An alien vanguard breaks through the Japanese lines, and attacks Yui's supply base.  Badly outnumbered and cut off from support, she has no choice but to flee...
That day, I carved my rejection 
of extinction in my heart,
Aquel día en que juré 
no volver a llorar jamás,
Aquel día en que juré 
no volver a llorar jamás,
Prometi a mim mesma que nunca mais choraria...