This is just a promotional video for the manga, so there is no story and you do not get to know any of the character's. Hopefully this manga is made into an anime because if it maintained this production quality, i could see it being great.
Non existent it's a promo video.
The art in this promo is great, they put a lot of effort into the backgrounds and details into the suits.
The sound in this promo is also pleasurable to listen too, I don't think i heard any common samples that are used in most anime.
The characters you do get
to see seem pretty cool and are easily identifiable. But once again no character development because this is a promotional video for the manga.
Though this was just a promo it was defiantly cool to watch, and makes you hope they eventually make an anime for this manga.