dunno where the original is from, but a copy is on danbooru
http://danbooru.donmai.us/post/show/181317

I had the original source bookmarked, but it's either taken down or unavailable at the moment.

I am pretty sure I posted the link in the Misao thread.

Nvm that link is down >>9435

This is weirdly addictive.

That's awesome! But I'm waiting for a Konata soundboard before I get too excited (and devious).

http://porinoshis.xxxxxxxx.jp/misao.htm

I came!!