S/mileage's 5th single, to be released on 4/27.
It will have 4 limited editions + normal edition.
(HKCN-50166, HKCN-50168, HKCN-50170, HKCN-50172, HKCN-50173)
Buying from one of the following 6 chains gets you a random trading-card-sized photo:
新星堂、TOWER RECORDS、HMV、TSUTAYA、山野楽器、キャラアニ
I believe some of them are also autographed.
Buying anywhere else gets you an A3-sized poster.
(The is the same promotion used with Mano's Seishun no Serenade)
http://s-mileage.jp/info/1753