Abunai Sisters: Koko & Mika was a series of ten CG-animated short films intended to promote celebrity models Kyoko and Mika Kano. Unfortunately, the show was so bad that it was canceled after the first two episodes aired and all the DVDs were burned (one wishes). Supposedly, only the two episodes that aired can be found online, and while DVDs exist, they are expensive. Its rarity is quite impressive, considering that it was produced in 2009. You can read more about it here.