Violet and Samantha find a spell to test out

As the two friends perused the mystical tome, they were shocked at the sheer level of detail contained within its arcane writings. The table of contents alone stretched across four pages, front and back, and it soon became clear why: The book documented every manner of sexual spell imaginable, intricately describing a wide range of techniques for supernatural charms and hypnotism, magically enhancing stamina or fertility, summoning succubi, incubi and satyrs, and, what caught the girls' attention the most, altering a person's body to be more sexually appealing.

Violet had always wanted a better body. She regularly ogled the idealized figures of the women in anime, video games and comic books, simultaneously fantasizing about fucking them and having a similarly perfect physique. She'd tried to lose some weight on a number of occasions, but each time she was frustrated at how slow burning fat was, and got further discouraged when her already meager curves threatened to vanish altogether. It was the worst of both worlds: She was pudgy, and yet had no curves to show for it.

Samantha, by contrast, was fit and toned, her tight, sleek midriff complimented by an ass and thighs satisfyingly thick with muscle. Despite this, she did have one insecurity; her chest. Her tits were fairly middling B-cups. Enough to be undeniably there, but smaller than she would've liked. Shallow as that desire often seemed to her, she felt like she'd be more confident if she just had another cup size or two. Ds, DDs... hell, even C-cups would make her feel more like the grown woman she was!

"These are some really... provocative spells, Vi." Samantha commented, trying hard to keep the lust out of her voice as she poured over the lewdly detailed descriptions and diagrams of various bust-enhancing spells and their results. "Yeah, they are pretty erotic..." Violet replied. "And these seem to have piqued your interest in particular." She added with a knowing smirk. Samantha blushed at that remark. "Ok, ok, you got me. These ones have got me fantasizing about fixing my biggest insecurity." She paused for a moment before her eyes lit up with they way they did when she had a sudden idea. "Y'know, Vi, maybe you should try casting one of these spells on me. If it works, I get the bigger boobs I've always wanted, and if not, we know it's a fake." Violet pondered her best friend's request, mulling the idea over for a minute or so before responding. "I can't think of a good reason not to try."

Violet flipped through the pages of the mystic tome before choosing which of the many magical techniques she would attempt to enlarge her friend's tits with. After some searching, she found one that was marked as 'simple and reliable.' The steps described seemed simple enough; begin the arcane chant of your choice to heighten your focus and attunement to ambient magic, concentrate intensely on the desired result and target of the spell, and with each hand trace a gradually widening circle in the air before you, facing your target, if possible. Violet stood and turned to face Samantha, beginning to repeatedly mutter a set of phrases she remembered from an earlier section of the book. She kept her eyes focused on her friend's breasts, imagining them growing larger. Admittedly, that did turn her on, but she figured that her arousal would only heighten the spell, given its nature. As she continued, she felt something in the air around her. Reality itself seemed to feel more... alive. She took that as her cue to begin the gestures the book had depicted, and to Samantha's awe as well as her own, the other girl's meager bosom bloomed. Little by little it grew, each circle of Violet's hands straining Samantha's top and bra further. C-cup... D-cup... By the time Violet ceased her casting, exhausted by the magical effort, her friend's formerly below-average boobs had just hit the DD mark.

Samantha was in awe as she groped her newly enhanced tits. They were everything she'd ever wanted them to be: Big, but not cumbersome, while still being perky without seeming fake. "I can't believe it's real..." she said under her breath before continuing to her friend. "Holy shit, Violet. The spell you cast actually worked...! Violet?" The other girl didn't respond to her best friend's exuberance, she simply stared. At first, Samantha thought that she was staring at her arcane handiwork, but no, she was staring right through Sam's magnificent milkers... Off into space, just like she did when she was deep in thought... in plotting... in fantasy...