Crystal Quartz from agentj01 on YouTube. I think it's very long, but it's still good. I like the melody. I think agentj01 also used the voice of Saki, though they have about the same pitch range (Since she's the one who sampled for Hatsune Miku's voice, after all). It also looks like that's the software used to make the Vocaloid songs. So, enjoy!

~Razi-chan