The characters are
Panty and Stocking, the angels and
Scanty and Kneesocks, the devils(They call themselves demons, but they're obsessed with rules so I think of them as devils), from Panty and Stocking with Garterbelt. Oh, and those youtube links are a little risque, so don't go watching them at your workplace(Scanty's and Kneesock's especially.).
Edit: Forgot to mention, I just really wanted to make a parallel demotivator to the angel one originally, but any fanart of Scanty and Kneesocks either has them:
A) In their sexy-time outfits(I wanted to get them in their uniforms)
B) Without their weapons
C) Is decidedly NSFW