SideMini

SideMini is a section of the game where the player can leave Souvenirs for chibi versions of the idols, after which the idols will give back a small Item in return. SideMini also refers to the chibi version of the idol themselves.

Office
      At the office, the player can leave a Souvenir. After 30 minutes, a random idol will appear, and leave a small Items (such as event Stamina Jellies, event AP Bars, Money, or Scout Points). A Whistle can be used to call upon idols quickly. Various Souvenirs can be left at the office. Some souvenirs can only be used in an event period and will disappear once the event gacha ends/next event starts (red background), while the rest are permanent (blue background).

Exhibition Room
In the Exhibition Room (展示室), the player can display various things collected in the game, including:
 * Event ranking trophies
 * SideMini Figures: Normal outfit, Changed outfit, and ORIGIN@L PIECES outfit
 * Magazines: Covers of the magazines the player has unlocked fully
 * Producer Titles
 * Bromides

Furthermore, it's possible to buy new backgrounds for the Exhibition Room using Money via the Mini Shop (Miniｼｮｯﾌﾟ).