I exercised the collaboration at Kotone's da...

I exercised the collaboration at Kotone's day(((っ･ω･)っ♡

Lala la la la la la la lala♪
Can u understand what is this song?
きょうはコトネの日の
コラボ練習してきたよ(((っ･ω･)っ♡

ららーららららららーらら♪
なんの曲かわかるかなーー?

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