Also known as: チルノのパーフェクトさんすう教室
Touhou song and Flash music video by IOSYS starring the titular Cirno.
A version of the song and MV would be released by McDonald'S in December 2025, advertising the Beef Stew Pie.
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Cirno'S Perfect Math Class
4 posts1 sourceWiki updated 12/4/2025
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チルノのパーフェクトさんすう教室
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