Happy Synthesizer - Hatsune Miku: Project Mirai DX

"Happy Synthesizer - Hatsune Miku: Project Mirai DX" is a high quality rip of "Happy Synthesizer" from Hatsune Miku: Project Mirai DX.

Jokes
The advertised track is mashed up with "Crank That". From 1:27 to 1:30 and 2:46, they are lyrics from Pretty Boy Swag by Soulja Boy.