Story of Little Monica, I think

Yep, and 「リトルモニカ物語」(Little Monica Monogatari) in Japanese.

Miu was the best character, by far.

I recently downloaded the Little Monica vids. Its definetly worth watching. 1 Catgirl wanting play and 3 sisters wanting the same thing.

I used a torrent for dowloading which i got from here: http://www.torrentspy.com/torrent/441740/The_Story_of_Little_Monica_1_2_extras_A_L