Star Medal Shop

The Star Medal Shop, released 10/26/18 (15:00 JST), allows for players to obtain old, previously unobtainable cards, new exclusive cards, and an item called the Rainbow Key, which unlocks the Rainbow Road (an upgraded Idol Road that causes rainbow effects to appear on a card) for a card.

Star Medals can be obtained by playing lessons. When a circle with a dog (Daikichi) or a bird (Wataru's doves) appears on a specific location (one of the four options) in the lesson, choosing that location is what allows you to obtain a few Star Medals. This often occurs a couple times a lesson.

It can be accessed via the same place as the Diamond and Yumecoin shops. Click on the building on the upper right of the school map, labeled School Store/Shop (購員部/ショップ), and click on the right of the two buttons on the bottom, called the Star Medal Shop (スターメダル ショップ).