Sprinkle. (スプリンクル。) is a photo book of Aya Eightprince, and one of two books that were released at the same time, along with Bouquet. It was released on January 17th, 2020 at HMV, and on January 29th at other retailers.
To commemorate its release, Aya held a number of instore events from January 17th to the 29th.