Chishiki no Kakushiaji

Word's out at school about a newly-developed drug that can make young women lactate, kicking off a new wave of camgirls trying to reel in dairy-crazy viewers. One day, Shiro's friend shows a clip of one of his favorite stars, and Shiro can't help but notice her shocking resemblance to his next-door neighbor. But the bookish Kaya's too preoccupied with equations and formulas to find time to eat, let alone play with her jugs in front of a camera... Or that's what Shiro thinks!

(Source: Fakku!)