A cover of [i]Happy Synthesizer[/i] sung by Len Kagamine and Rin Kagamine/96Neko with minor issues that can be overlooked unless you have an OCD for this.

<a href="https://www.notessimo.net/page/browse/songs.html/_/cover/other5/happy-synthesizer-r72574" class="onebox" target="_blank" rel="noopener">https://www.notessimo.net/page/browse/songs.html/_/cover/other5/happy-synthesizer-r72574</a>\nA cover of Happy Synthesizer sung by Len Kagamine and Rin Kagamine/96Neko with minor issues that can be overlooked unless you have an OCD for this.