So, one day I was bored and took a peek in to Nicovid…
Naraku no Lucky Star
Naraku no Zetsubou Sensei
Naraku no Hana ecchi(?) remix?
Geass no Naku Koro ni ~Hangyaku no Hana~
Yeah, I gave them the witty(lame) names myself. My personal favourite would be the Geass one. Enjoy the vids while they last :x.