Aizawa Ryota was in the 3rd grade of the preparatory course of Central Military Academy. AD 2045, he went to a space station, Aries, for the training with his classmates including Nagase Saka and Nittak Kazuhiko. However, the station was attacked by a terrorist group, Hallarax.Now they must find a way back to earth.

[Source: Anime News Network]

Main characters reminiscing about their past.

Recap Special. First half of the episode follows Cellaria from her point of view and her narration. Second part follows Nanami from her point of view with her narration. Takes place between episodes 10 and 11 (Episode 10.5).