“Oooh yes, senpai! I love my big, bouncing titties!” Riko cheered through gritted teeth, trying her best to sound convincingly sunny. “I want you to shove your cock between my boobies and cover them in your yummy cum for me to lap up like a good little bitch!”

Her master Izuki grinned, his hard erection poking out from underneath his swimming trunks as he tormented his submissive little sex kitten. “Hmm, I’m still not sure Riko-chan. Are you sure you want me like that? It’s not very polite for a young lady to use such language, you know.”

“I’m ***sorry***, senpai...” Riko apologized, pressing her chest against her partner’s as she looked up into his eyes, already feeling his cock pressing into her flat stomach. If I can just get him to have sex with me already, I can stop embarrassing myself in public like this... she thought. “I just can’t help but get sooooo horny when I think of you that way! Please please pleaseee fuck me like a good little slut!”

As much as Izuki must have loved watching the cute, busty foxgirl beg for his member, Riko could see that he was already beginning to waver - it wouldn't be long before she was on her back once again, enduring her master's cock once again.

Riko wasn’t always a sexy, obedient little foxgirl - a month ago she had been Riku, a popular top-performing male student at the prestigious Matsuhara Academy, and he was rarely seen without his nose in an old book or on the baseball field practising his pitches. However, one day Riku was looking for a particular volume for his personal research and was forced to sneak into the off-limits section of the school library where he found an old leather-bound tome of spells by complete accident. He wasn’t planning to use any of the spells for evil, but he was so absorbed by its contents that he didn’t even notice that a boy from his class, the dorky hentai-obsessed otaku pervert Izuki, had noticed what he was reading and had decided to ‘borrow’ it for his own devious purposes while Riku was in the bathroom. Using the focus of a sexy, busty young foxgirl from an erotic doujin he was reading, he secretly cast a body transformation spell on Riku to turn him into his dream girl.

Riku was immediately suspicious of what was happening when his private study was interrupted as a strange pink mist began to envelop his body. “What... what’s happening?” He asked, feeling something strange pushing on his head. Reaching up, he noticed what felt like two fuzzy ears. His hair suddenly lengthened and turned a bubblegum-pink, getting in his eyes.  “I-Is this...?” Everything was getting slowly bigger as his body began to shrink, his arms and legs losing musculature as they became feminine and slender. His face became soft and cute, his eyes expanding into adorable golden orbs as his skin became flawless. His uniform was now ill-fitting as his waist pinched in and his hips flared out, ass expanding into two curvy globes as a long, fuzzy tail began to grow from the small of his back. Feeling the fur of his long tail against his shoulders, he wanted to squeal until felt his breath escape from his body as the final touches of a pair of huge, bouncy G-cup boobs swelled out from his chest, inverted nipples and all. Looking at her reflection in the window as the mist vanished, she raised her hands to her cheeks and screamed. He - or now, she - was a busty, cute, incredibly sexy fox girl!

Izuki emerged from behind his vantage point, hand down his pants, and cackled at his success. “I can’t believe that worked! Wow, Riku - or should I say, Riko - you’re even hotter than I ever imagined!

This was you!?” Riku spat through tears, realizing that she had been transformed into this pervert’s wet dream. “It was all that book! Give it back! Now!” She ran up to Izuki and began pounding him with her fists, but in her small, delicate body it was useless.

“Ah ah, you sexy little thing.” Izuki chided, unbuttoning his belt. “I see the spell didn’t change your personality: you’re still your old, stuck-up self. You know what? I’ll change you back, but first you have to do a favour for me... let’s put that sexy little mouth of yours to use, Riko.”

“Gross!” Riko gagged, her ears folding down. “Like heck I’m doing anything sexual with you, you disgusting sleazebag.”

Izuki smirked, holding up the book. “I disagree, you sexy vixen. Not only did I change your body, but you’re illiterate now... I can’t have you reading books when you should be focusing on your senpai’s pleasure. So that means I’m the only one with the spell who can change you back. So, you either do as I say... or you’re going to spend a long time in your new form.”  Riko gulped, realizing what she was really being forced into.