Five editions, regular + 4 with limited jackets:
http://ameblo.jp/officejr-cheer/entry-11506436716.htmlHMV got this extra bit:
□VICL36789…4曲入り通常盤
□VICL36790…4曲+1班の自己紹介!/ジャケットは1班の衣装Ver.
□VICL36791…4曲+1班の自己紹介!/ジャケットは1班の水着Ver.
□VICL36792…4曲+2班の自己紹介!/ジャケットは2班の衣装Ver.
□VICL36793…4曲+2班の自己紹介!/ジャケットは2班の水着Ver.
So you have 2 "costume" jackets and 2 "swimwear" (according to Google) jackets.
They are already starting to promote it (tomorrow they are at Shimokita FM show) and this picture should be a tip of how the costumes are going to look (if you check further you would see how the "Welcome" is over the jacket).
http://ameblo.jp/officejr-cheer/entry-11508639201.html