Anthony and Nade are two nerdy best friends from school that get assigned to work on a science project together. The hypothesis they come up with is whether having sex regularly affects the brain in a negative or positive way. The only way to verify their statement is by inviting Mira, the hot stepsister, to try it out. Nade and Anthony run a few freeuse experiments on her while doing puzzles and other brain teasers. Mira plays along willingly, all for the sake of science!