Yu Kobayashi, that's what. The Japanese voice actress, known for her twisted drawings, sets her sights on schoolgirl rocker anime K-On!. This is the result.
Goodness, this is scary. It's like her pen channels the soul of Satan himself.
For those not familiar with K-On!, this is not what the characters are supposed to look like.
Yu Kobayashi previously voiced characters in games like Ar tonelico III, Metal Gear Solid: Peace Walker and Pokémon Mystery Dungeon as well as many anime, including the feature film adaptation of Animal Crossing.
There's even a Yu Kobayashi t-shirt for you to frighten your friends and relatives.