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Participate to Cirno's perfect math class !
Cirno decided to do his perfect math class ! Become a genius like her !
When Cirno teaches, answer by the wrong answer. Except when it is 9 who is always a good answer!
Sometimes Daiyousei replaces Cirno, so just answer the math.
Rumia, Mystia and Wriggle also participate in the class, but are not very disciplined !