I was able to find this:
Yamada-kun to 7-nin no Majo OST (Music Collection) - HikarinoAkari OST (http://hikarinoakariost.info/yamada-kun-to-7-nin-no-majo-ost-music-collection/)

But i dint found the full OST, im looking for a song instrumental with a nice guitar arrangements

im still Looking for that soundtrack

I'm also interested in this OST, if someone has it, it would be great :)

I still need =/

and I'm still interested too^^

Anything that wants requesting should be posted
here (http://forums.ffshrine.org/forumdisplay.php?f=94)