SummonNight 6: Lost Borders Trailer, Cover and a question

[KazumaKiryu]

its really beautiful. here is the japanese cover - SummonNight 6: Lost Borders

http://www.amazon.co.jp/%E3%83%90%E3%83%B3%E3%83%80%E3%82%A4%E3%83%8A%E3%83%A0%E3%82%B3%E3%82%A8%E3%83%B3%E3%82%BF%E3%83%BC%E3%83%86%E3%82%A4%E3%83%B3%E3%83%A1%E3%83%B3%E3%83%88-%E3%80%90PS4%E3%80%91%E3%82%B5%E3%83%A2%E3%83%B3%E3%83%8A%E3%82%A4%E3%83%886-%E5%A4%B1%E3%82%8F%E3%82%8C%E3%81%9F%E5%A2%83%E7%95%8C%E3%81%9F%E3%81%A1%E3%80%90%E5%88%9D%E5%9B%9E%E5%B0%81%E5%85%A5%E7%89%B9%E5%85%B8%E3%80%91%E5%BA%8F%E7%9B%A4%E3%81%AE%E6%88%A6%E3%81%84%E3%82%92%E6%9C%89%E5%88%A9%E3%81%AB-%E5%8F%AC%E5%96%9A%E7%8D%A3%E2%80%9C%E3%82%AA%E3%83%A4%E3%82%AB%E3%82%BF-%E3%81%8C%E5%85%A5%E6%89%8B%E3%81%A7%E3%81%8D%E3%82%8B%E3%83%97%E3%83%AD%E3%83%80%E3%82%AF%E3%83%88%E3%82%B3%E3%83%BC%E3%83%89/dp/B019MKKES6/ref=zg_bsnr_2494234051_7

but what is SummonNight ? i have no ideas. which genre ? maybe here on VGChartz is a fan.. ?

and a new trailer:

https://www.youtube.com/watch?v=cdFAMYhomHk