I'm not much of a fan of how Mio's VA does that weird high-pitched thing every ten seconds when she sings though. It's hard to say if it's a bad singing habit of hers or if she's doing it on purpose, she can seem to live without it in Tsubasa wo Kudasai, but the only reason why it's not as noticeable in songs like Don't Say Lazy is because it can hide a lot easier in the background mix.
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