Question Name that song?

So, I was humming a tune in my head this afternoon but I'm not sure what song it is. Out of curiosity, is there a song with both Miku and Len where they both use electric guitars? It's mostly his song but she sings along periodically. I vaguely remember seeing a video of it a few years ago but I'm not too sure if it exists or if I'm just imagining it. At the time I didn't actually know about the Vocaloids and it was just something I saw someone in school viewing on their computer next to me. I had just started to get into Japanese music in general so I'm sure he mentioned it but with my 56k internet at the time I wouldn't have even tried to view it at home. Eventually I must have forgot everything but the beat. So after my long-winded explanation, can anyone help me out?

 

Wow, that's it! Well not the exact one but I found the one that was in my head based on the one you posted. Thanks once again Infinity! I was afraid it was too vague of a description for anyone to help me for a moment there.

Funny how some things stick with you throughout time huh? I guess it proves that the memory will never go away only fading until it's triggered once again.

 

Right but what I meant was that it was not the exact one that's was stuck in my head. My memory was about the Len/Miku one before listening to the one Infinity posted, all visualizations were based on what I remembered at the moment. Sorry, I should have clarified that earlier. Your are correct though, they are the same song in general.

 

Yes I understand that but what I was saying is that despite the fact the song was the same, the version I remembered was different from what you posted. I wasn't debating the content of the song in question, I know it's the exact same one. All I'm saying is that what was playing in my head at the time was the Len/Miku version and not another variation.


[Edit] November 28 2012
It's completely my fault, I realize that sometimes I when I write something I often tend to omit a crucial detail thus leading to confusion. That however is certainly not my intention and after articulating what I have done It'd do me well to pay better mind in being descriptive. I do sincerely thank you for help me find the song and further more for the information on the controller as well.