Release an invisibility gas

As you look over towards Tammy, you notice her body beginning to disappear. Her skin and hair slowly become transparent until you can see right through them. The only thing not affected is her clothing.

"Holy shit!" You shout.

"Did Tammy turn invisible?" Rebecca asks.

"Who cares about the dork?" Dana asks. "What happened to us?!"

You look at the other four girls and see that they, too, have turned invisible. Rebecca's trendy clothes and jewelry float in the air alongside Denise's gym outfit and Chris' t-shirt and shorts. You even risk taking a look at yourself. Sure enough, your own body has disappeared.

"This is fuckin' awesome!" Dana shouts. "Can you imagine the shit we can get up to like this?!"

"I can't go around invisible!" Rebecca shouts. "The cheerleaders' uniforms can't go floating around the pyramid during the game!"

Tammy's clothes slowly stand upright. "Well...you're not totally invisible! If you look hard enough..."

You take her advice and strain your eyes. To your shock, the other girls come slightly into view. Now they weren't totally transparent, but they seemed to be in a dimmer light than the clothes they were wearing.

"Why did you have an invisibility potion anyway?!" Denise screams.

"I-It was an experiment with Hateya and Alena!" Tammy pleads. "We just wanted to make something that would be out of a sci-fi movie! Or like one of those magic spells Alena tries casting!"

"And you couldn't make it affect clothes?" Chris asks.

"Well, clothing has too many variables," Tammy rambles. "The brand, the material, the wear or tear...the human body is much easier to work with."

"Well, how are we supposed to go around like this?" You ask.

Dana suddenly grows one of her trademark grins. "Hey! Anyone thinking what I'm thinking?!"

The girls shuffle around their feet nervously. Tammy looks confused before gasping in shock. "No way! I'm not taking off my clothes in school!"

"Aw, c'mon, you big prude!" Dana says, grabbing her shirt. "No one can see us!"

"Sam can!" Rebecca points out.

The girls all focus their gaze on you. Dana suddenly stops smiling, but doesn't remove her hands from her shirt. You feel like you should say something, but your mind goes blank as you imagine seeing your female friends naked together. And the fact that you'd have to strip down with them doesn't help.