Yeah it was a pretty cool manga, though with that final scene their was clearly supposed to be more to it, a shame the manga was cancelled before it could tell the whole story.
But their is actually something out there that continues the story, that something is a old ps2 game called encounters in space, you see it has this ace pilot mode which lets you play through campaigns of each oyw ace, among them is Yuu Kajima, its in English and fully voice acted, its also pretty simplified compared to the sega games but hey its better than nothing.