This flash has so many really goood things to say about it, I'm almost unsure were to start.
Firstly, the graphical animation is stellar. This flash to me seems to be near professional quality in graphical animation. With just a few minor hitches, everything is fluid and very pleasing to watch.
Next, the sound is nearly perfect. My only problem was that the voices seemed to lack a little bit of emotion in some places, but considering this was originally in Korean, with English voiceovers, I can't complain at all. I'm just glad it was even put into English! Also, the music is great, and really adds to the feel of the flash.
And finally, the one thing I love about this is it has such an in depth story. You've really thought out everything in this series and it makes everything so much more believable.
Overall, I rate this submission a 10/10 and a 5/5, well worth your time to watch :)