Lisa poses as a college student after befriending college girls who can pass for elementary school students because of their height. Meanwhile, a Chinese mosquito infects Bart and Bart must live in a plastic bubble.

!! Tropes:

* {{Jerkass}}: Milhouse. He followed Lisa and ruined her happiness simply because he was being a nosy brat.
* OlderThanTheyLook: The college girls who believed Lisa to be one of them.