今日は『カチューシャの唄の日』だそうですが、ロシア歌謡の事ではなかった模様...。そんなプラウダ高校。

It seems that today is "The Day of Katyusha's Song", but it's not patterned after the Russian version. Such is Pravda High School.

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• Japanese: https://en.wikipedia.org/wiki/Katyusha%27s_song
• Russian: https://en.wikipedia.org/wiki/Katyusha_(song)

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