Giantess creator Sasha's lucky fan won her once in a lifetime "interactive" experience and she's invited her creator friend Isla to help. The girls have a whole week of debauchery planned for their guest, but first thing's first, he's got to sign the paperwork and get a good night's rest ready for the action. After their guest has departed, Sasha explains to Isla that she's got an exciting surprise in store for them all. Isla admits she finds the guest rather handsome and can't wait to find out what the surprise is. Sasha assures her that before the week is up, Isla will have the attractive guest in the palm of her hand. The next morning, Sasha sneaks into the guest's room to see how he's getting on. She's happy to see that his glass of water has been sipped on. The glass that she added a special shrinking serum to. And she's even happier when she peels back the bedsheets and finds the fan has shrunk to no bigger than her hand. She tells Isla she's ready to reveal the surprise, but when she does, her co-star is confused. There was an adult man in the bed just last night and now all she can see is one of Sasha's little giantess prop dolls. But when Sasha raises the tiny man to her ear, Isla soon recognises the sound of a tiny heartbeat and the warmth of the man's little breath. Isla can't believe how Sasha's done it, but she's now even more excited to wake him up and start the experience. They place him at the foot of the bed and gently call to him, tickling him with their fingers. He's clearly groggy and confused, so Sasha welcomes him to Day 1 of the immersive fan experience and informs him that he's been "altered" to help him appreciate the giantess experience properly. He appears frozen in fear and lust, so they pick him up and pull him to their faces, promising him he'll enjoy it. She explains they'll have a few days with each other then he'll be released unharmed and with the antidote. So just enjoy! The girls notice his erection growing and decide it's time to get fully acquainted with one another. They begin to lick him and rub him all over their bodies, before moving to the living room where they share and playfully fight over his little body. They squeeze him in their cleavage, rub him up and down on their clits, slide him inside each other's pussies and grind him between them while they scissor. When the threesome is over, Sasha and Isla go off to take a break, but come back to find the tiny fan missing. They search around until Sasha eventually notices a tiny speck on the floor. On closer inspection, they realise it's the fan and he's shrunken to less than an inch! She admits she was told that size fluctuation could be a side effect of the shrinking serum, but neither her nor Isla seem to concerned. They begin to enjoy their even heightened sense of power over the fan and toy around with him using their feet. The spread their toes, flex their arches then stomp and grind him against the ground, testing his little body's resilience. Eventually Sasha picks him up and places him in her cleavage for safekeeping, explaining there's even more fun in store tomorrow. The next day, Sasha invites Isla to join a special last-minute live stream she's decided to set up, inspired by the tiny fan's new size. The girls begin their stream by addressing the crowd of giantess fans and explaining that they're about to meet the lucky fan who won Sasha's competition. They reveal him, strapped to a fuck machine dildo by a condom, and begin to play with him, egging on the crowd to help the girls get fucked by the machine and the tiny man that's attached. In all the excitement, the fan shrinks even further as he's being slid in and out of each of their pussies, his tiny body being used to make them both cum. When they're satisfied, the giantesses allow the stream audience to chose how the show will end. A fan tells them he wants to see the tiny man swallowed up by their assholes, so the giantesses take turns sliding him inside their asses, winking their holes around him as he gets sucked in deeper and deeper. When the show is over, the giantesses address their fans, assuring them their tiny little guest has earnt himself a day of rest before the action begins again.