In the middle of an intergalactic war, one of the best pilots in the stellar fleet witnesses helplessly the destruction of the entire fleet and, with it, the annihilation of all mankind. When the oxygen in his destroyed ship ran out, he only reproached himself for not having been able to at least die like a hero. However, without knowing why, his soul returned in time to the day of his entrance exam at the academy. This time Eneas would save his life, his mother's life, and everyone he could save. Armed with an inhuman ability to pilot, he will make the most of his mecha, the Phoenix named Uroboros, changing history of the universe forever.
Although there were many casualties, in the end, they were not as many as a classic raid would have caused. All the cadets survived, as did most of the Mecha officers; really, the bulk of casualties were among the soldiers who did not have autonomous fighters. The mission itself could be considered a success.
It is true that the sector had not been recovered; the arrival of reinforcements meant that it was still occupied by the enemy, but what could have ended in tragedy was, in the end, a resounding victory.