With this app, you can fully enjoy the charm of the popular singer group "Ireisu".

From member profiles to song lyrics, delve deeper into the world of Reisu through various quizzes.

By putting your knowledge to the test, you can strengthen your bond with the Irregular Dice.

Also, this app made a wallpaper with the image of a chair. Riura, -hotoke-, Hatsuto, Naiko, if, Yusuke. You can enjoy the feeling of being with the members.

In addition, there are plenty of special events and collaborations! Episodes when Irisu collaborated with other popular singers,

It is full of ways to enjoy it only for fans, such as the inside story of the video they sang.

Put your knowledge to the test and enjoy new discoveries with these easy quizzes. The world of chairs is waiting for you.
・People who love “insert” from the beginning of their debut
・ Fans of “Ease”
・ Those who want to know more about "insert"
・Those who are looking for stories to talk about
・People who are looking for interesting apps to play
・ Light test like a game to kill time
・People who want to take idol quizzes in their spare time
・Those who are confident in their knowledge of chairs
・ Those who want to have fun in their spare time
・ Those who want to play a quiz app
・Those who want stories to talk about.