Why isn't Cirno thinking in base 9? She would get to 10 so much quicker.
⑨th ChapterOkay.It's Cirno's turn to be "it"! You can only open your eyes after you've counted to ten, okay?Rumia, Mystia,Why hasn't Cirno come over here yet...let's play hide-and-seek!Everybody run!Let's take a look.⑨!