WARNING: DO NOT READ IF OFFENDED BY TALES OF BREAST GROWTH OR SEXUAL STIMULATION

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Not Quite

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The magic was going to work this time.

Having already tried a multitude of materia, this one would make her the ultimate conquest of the party. Tifa and Aeris would just have to step aside.

Yuffie smirked, and concentrated hard on releasing the power within the small green orb she held. The orb flashed, and Yuffie dropped it in shock as a fierce tingle shot up her arm and into her chest.

Her breasts billowed out almost instantly, heaving quickly upwards from her original size to a much more noticeable F-cup, holding their shape perfectly and bobbing mightily under her already-tight green top, now stretched to its absolute limit with breast flesh flowing like so much dough around the hem. 

She moaned involuntarily at the sensation caused by this sudden growth, plunging her fingertips into the new flesh and massaging herself heavily, almost to orgasm within the first few seconds of contact.

Breathing heavily she looked down at her new assets. It wasn't quite what she had wanted, and it would slow her down quite a bit...

But if this didn't do the job, she could at least go and perform some fan-service, right?