Hermione Granger has been working on a potion to de-frizz her hair, but she really messed it up this time! The day after taking it she wakes up significantly fatter and flabbier than she did before! Shocked, she wondered what she did wrong to cause such a side-effect. Her button down shirt barely fits over her inflated gut now, and not to mentions how thicc and plump her thighs and ass has gotten! She tries to figure out a plan to brew an antidote without anyone seeing her, embarrassed about her new voluptuous figure and what people might say. She thinks about asking Ron or Harry to brew up an antidote, but what if they get it even more wrong and she ends up even fatter? And what would Viktor Krum think? She squishes and squeezes her new flab, inspect it with embarrassment. But she realizes just how nice it feels to have her flab squished this way, and how delightfully soft all of her new pudge is. She can't help but get turned by the feeling of having her chub played with, and wonders if maybe Ron would like to do the same. He does like big, fat, jiggly tits, after all. Maybe he would enjoy big, fat, jiggly girls too. She begins to touch herself, imagining the way her fattened body will jiggle and bounce when she got fucked, and all the new places to grab onto for leverage. She jiggles her belly as she gets off and grows addicted to the feeling, cumming loud and hard at just how fat she's gotten! A magical weight gain fantasy featuring Hermione Granger! Featuring belly play, jiggling, teasing, squishing, fat talk, embarrassment, and then arousal at Hermione's new plump body with masturbation, pussy play, and fingering