Uploaded June 2013 | Updated September 2026, 18 hours ago

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"I haven't committed any sins!"
The guitar part at the beginning sounds pretty nice sped up, I think.
The song is "Eien Ni Shiawase Ni Naru Houhou, Mitsukemashita." (永遠に幸せになる方法、見つけました。), or "A Way To Become Happy Forever, I Found It." It's by Utata-P, and the singer is Hatsune Miku!
I don't own the song or the picture, I just sped up the song with Audacity and got the picture on Google.