Katie Cooper has arrived at Hotwamhq for a special science lesson! Dressed in her very revealing uniform, she inspects the curious contraption in the lab, but can't work out what it's for. She nervously positions herself under the nozzles and the gunge is released!

The thick gunge covers Katie's tight white blouse, tiny red miniskirt, and black lace-topped stockings. Her hair and face also get covered as she giggles and squirms, tilting her face up so that she can feel the gunge running down it. Katie runs her hands over her body, then pulls open her blouse to let gunge flow inside it. She smooths the tight fabric over her pert braless breasts, and we can see her rock-hard nipples poking through the flimsy material.

Her hands stray between her legs, then pull aside her white thong knickers to let the gunge fill them, her giggles and squeals turning to gasps and groans as gunge covers her most intimate areas. The flow of gunge continues as she pulls her knickers up tight into her crotch, pressing the gunge into herself and forcing it to flow out around the tiny triangle of fabric. She turns away in embarrassment, which shows the gunge coating her hair, and she spreads it to catch as much gunge as possible before shampooing it in. Katie can't resist plunging her face into the pool of gunge around her, pushing her face and hair through the thick layers of slime. Rolling onto her back with her legs spread wide, she plays with herself again, slopping handfuls of gunge onto her face while she frigs herself. She explains that her uniform has got too messy, so she strips out of it. "I hope you haven't run out of gunge!" she says!

The gunge machine is triggered again, and this time it's an intense single pour rather than a gentle shower. Katie tilts her head back, surrendering to the torrent while her hands roam across her body. The split screen view lets us see how the gunge flows over her whole body, while also showing closeups of her naked breasts, her gunge-covered face and her beautiful pussy. Katie switches onto all fours for some head dunking, while the gunge machine pours directly onto her ass, and with all those sensations hitting her at once it's not long before she starts playing with herself again!

Laying contentedly in a lake of gunge, Katie grabs a large dildo, sliding it into herself as she again grabs handfuls of gunge and slops them onto her face and hair. That's not enough mess for her though, and she begs for more. As Katie fucks herself deeper and harder, bucket after bucket of thick vibrant gunge is poured onto her. We watch as this shy student is turned into an unrecognisable blob of gunge, shuddering and crying out as she has an intense messy orgasm.

Finally satisfied she flops face first into the gunge lake, and declares this to be the best science lesson ever. Outtakes follow to show just how much fun Katie had in her first-ever WAM experience!