You run to the car

You doubt you could run all the way back to campus through any route. Your best bet is the car, even if they are strangers. You turn and bolt towards it.

You get to the car and throw open the back door and jump in, slamming the door shut behind you. Instantly the car pulls a u-turn and bolts off away from the van at full speed, leaving the van and the girls behind in the dust.

You look back and the van falls away from view. You see the burly girls throwing their arms up in frustration. The car apparently has too much of a head start to bother pursuing. You make a sigh of relief and look around the car. The guy who opened your door is sitting in the passenger seat. He's about your age. He's wearing a tight shirt that does little to hide his rippling muscles underneath. Another college age girl is driving. She's also very athletic, well endowed and wearing tight clothes, but not revealing.

Noting the awkward silence, you introduce yourself.

The guy says "I'm John, this is my sister Felicia."

You respond "Nice to meet you both. Thanks for the save by the way." Then a thought occured to you. The road you were on wasn't exactly well traveled "Say, how did you know I needed help?"

The siblings look at each other briefly and nod. The doors lock suddenly and Felicia says "I need you to stay calm as we explain." You nod suspiciously and she continues "My room is next to Miranda's, she's our older sister. I heard everything this morning"

"What?! Are you just bringing me back!?"

"No" says John "It's not like that. We're no like her."

Felicia resumes "Most of my what older sister told you was only half true. My dad did lose a bunch of money gambling, but only because he was trying to pay off her spending debts. This harem racket is her get rich scheme and it's unfortunately worked very well. She's even cut Miranda in on the profits. But we want nothing to do with it. It's gross, indecent and they're going to get caught."

"In short, my friend" John says "This whole school has been infested by this scheme. We are part of the resistance."

The car stops at a crossroads and Felicia says "We can either take you back to you dorm and you can start over on campus, or we can take you a resistance meeting, and you can help us. But you have to choose now."