Umm off the top of my head....Ashita e no Sanka actually~ I do love its instrumental, but without alan, it wouldn't be awesome at all
^ Yes! my life too! It's a rather simple song, but without alan~...it just wouldn't be the same
And Namonaki Tane, it sounds pretty good from the previews, but alan just makes it all better
But then there are some songs that the instrumental is just effin awesome! Need I mention Sakura Modern?