Refer here for a list of the cards in this gacha: http://pad.skyozora.com/news/期間限定的特別抽蛋「ストーリーフェス」登場!!
I rolled once and got a Chibi Amaterasu and have already sold it. The GFE in the machines are quite attractive but I think it's mostly going to be a Chibi Fiesta so I don't recommend rolling too much in this. Check out Minpuzz's compilation of some Twitter rolls for reference: http://minpuzz.com/blog-entry-13035.html.
