Clione no Kimochi -Oshiete, Sensei Osanazuma-

Somewhere on the Darkside of the Moon, Second Lieutenant Fernandez and his all-female pilot squad are fighting for their lives against overwhelming forces. The XEN-TRIX mobile suit is technologically superior, but even cutting edge technology doesn't count for too much if you are outnumbered twenty to one.
Inevitably, a well placed shot inflicts critical damage, and Fernandez falls into a dark oblivion of wild memories...

[From vndbreview]