Roughly translated it's "Country Gem". This video is for the upcoming manga release of the first volume and it's gorgeous! I was shocked to learn that it wasn't an upcoming Anime series either (at least not yet). The story is pretty interesting sounding as well; it's about a new life form (called Gems) that are born and constantly attacked by Moon people. They're designated roles like warrior and nurse with the exception of the main character. I love the art style and it's a shame that it's just a promo. Also this blows both of the recent videos that Marvel and DC have released promoting their comics, just saying.