Music: Rental Magica - Aruiteikou

Don't know if anyone remembered Rental Magica. It didn't really leave a mark on anime history as far as I know. But the one thing I can never forget about it is the ending song which I love dearly. It is one of the few songs which I listened and sang to so much that I can actually sing the chorus. Yes, only the chorus... You were expecting the full song? I wish!

Aruiteikou by Yoshida Jungo
Now if you can find the acapella version. Even better!