It's time to split into groups

Your physics class had an odd number of students, so you were grouped up with two others rather than having a single lab partner: Rebecca and Julie.

Julie, the very same petite Asian from gym class, was taking notes as Rebecca, a freckled blonde girl with D tits, was trying to get the experiment your teacher assigned your group to yield results. You sat down at the table next to Julie and observed Rebecca for a few moments.

Normally dressed in jeans and a long sleeve shirt that showed no cleavage, today Rebecca was wearing the same thing every girl was: almost nothing. As she fiddled with the small weights on the table, your view of her pale, beautiful tits was nearly unobstructed.

"I don't think you lined the lasers up properly. The diagram on the worksheet has them like this..." Julie stood on her tiptoes and leaned forward over the lab desk, rectifying Rebecca's mistakes and inadvertently exposing her tight pussy and recently-dildoed asshole to you and anyone else looking her way.

You forego your grading card for something more potent, and start writing in the Rulebook.

New Rule: The owner of this Rulebook's explicit and implicit will must be obeyed.