Japanese male band music video

Hi, there.

I remember watching a music video on youtube a couple years ago and I'm desperately trying to find it again. I'll tell you how much I remember from it...

It was an all male band, but I can't remember whether it was jpop, jrock, etc. There were three or four members, and I believe there were some that had long hair. I'm positive there was at least one playing a keyboard, but I think there might have been two.

Anyway, the music video looked as though it was set in a classroom, or at least part of it was. There's only a small part of the tune that I remember, I hope this is helpful: 'du-du du-du du du' and it sounded like they might have sung 'from me to you' at some point.

I hope that's enough for someone to recognize! This is driving me crazy!

Need more details because that describes many bands.

Here is a Japanese band with a music video in a classroom setting, not sure if its the pv your talking about but:
https://www.youtube.com/watch?v=Gz46XekqlCA

Here is one where there is a keyboardist in the group and its in a school setting:
https://www.youtube.com/watch?v=QR38unxBYhQ