What you are watching here is the part 1 of Morino Aruzi's flash animation, 空のエトラ (Etora's wings), that used to be on the manganovel website. Since it has never been hosted again anymore (not even by its creator), I'm rehosting it here. Indeed, it will be removed if the creator asks for it (hoping he may host it again on his website someday). I also managed to include subs by digging into the manganovel webpage code. Unfortunately, they are only in French since I was mostly interested in a French translation when I downloaded the animation back in 2008.

Excellent news as Morino Aruzi has finally reuploaded both episodes on his Youtube channel! Epsiode 1 can be watched here:
https://www.youtube.com/watch?v=vJ6IJMiJ7s4

And episode 2:
https://www.youtube.com/watch?v=RqVoLTrq0B0