Dragon Puberty

Our story began in the Nohr Kingdom's Royal Castle, where a young princess by the name of Corrin was peacefully reading a book, but not just any book, it was an encyclopedia focused on the mythical creatures known as... "Dragons". 

Corrin was no average human, she was a halfling possessing dragon blood, as revealed by one of her maids during some tragic events... 
She could morph parts of her body into those of a dragon and even transform into one if she concentrated...

However, even if she had mastered those skills, she was having issues for the last couple of days, she was plagued with painful headaches, her arms felt like noodles with a painful burning sensation which only increased in intensity each passing day. On top of that, her condition has inconvenienced the people of Nohr, with random bouts of shifting dragon parts and mood swings.

She needed to find a way to get rid of these conditions, so she went to the local library, where she luckily found a book about dragons called: "The Draconicon".

Corrin had borrowed that book from the library and has been reading it in her bed for a while, determined to find a cure or a way to prevent such effects. She read though every page, seeking answers restlessly, knowing she wouldn't be disturbed by her family, since normally nobody comes to see Corrin, except for her loving sisters (which were away on a quest with her father). In her feverish reading, she found the burning sensation to be too much in her armor, and stripped down to her black bra and panties. She continued her search, running through a gauntlet of emotions, until she found what she was looking for...

"Found it! This must be it!" Corrin said, eyes wide with excitement.

She quickly calmed, not wanting to draw attention to herself despite the solitude. She began to read out loud: "Dragon Puberty: Changes on the Body...This process consists of many changes which happen normally amongst young dragons..."

She impatiently skipped the list of side effects that manifest in regular dragons, and went straight to the list concerning halflings.

"Here it is!"

“Those who are only half-dragon in blood experience different effects than those of full-blooded dragons. List of changes include sudden mood swings, loss of control on dragon-shifting abilities, draconian features developing in human form, and…” Corrin paused in fear before reading the last side effect…

“…growth spurts…I’m so not looking forward to this..." she groaned.

As Corrin shakily pushed herself upright, she buckled down, lied on the bed as the burn in her body returned, even stronger than before. Inhuman-looking veins began to snake throughout her body as she winced in pain. She moaned as she watched her right bicep rised into thick, hard muscle. Corrin lifted her arm and flexed to see that the bicep doubled in size, as the tricep and forearm also bulged with power in sync. She looked over to the left arm only to see it grow to match her right. 

Such titanic arms were in need of a torso to match, and surely enough, it too started growing. Corrin felt a great pain in her chest, like there was some force pushing it from the inside, trying to get out. As her breasts rose higher from the increasing mass, Corrin felt her bra strain to contain her greater chest. Breast meat spilt all around it, and gave her some underboob. Her abs soon followed as it started to rise like buns baking in dragon fire. With a gasp, she tried to hold it back, but the sensation was too much.

As Corrin desperately tried to catch her breath, her thighs started to shift and thicken. She wanted to scream in pain, but couldn’t muster the energy to do anything more than a suffocated grunt. Corrin’s thighs swelled, pulsed with power and expanded muscle. As if not wanting to be undone, her calves grew in proportion with her thighs. Corrin felt her panties digging into her skin as hips widened and buttocks swelled into a nice shape.

The transformation appeared to have ceased, as Corrin began to inhale and exhale to relax herself, she began to examine her newly transformed body. Her once delicate figure was now a much more muscular build. She noticed that her dragon features have become much more pronounced, her ears have become longer and sharper, and her mouth was full of ravishing sharp teeth and nails shifted into claws, her underwear felt much tighter, it looked like they were about to snap off at any moment, she had nothing else to add, she approached to the nearest mirror and couldn't believe it, she was devastated...

But then, she flexed, her sad face fading away and turning into a smug look, one could have assumed it was a sudden mood swing...

"Yeah, this might not be so bad after all..." she said, feeling cocky as she flexed her mighty body.

She reached to the balcony, where she screamed a long, loud dragon-like roar out to the horizon:

"Look out Kingdom of Nohr, for your new and improved princess has arrived!!”

One could say she had gone mad, that that wasn't Corrin, other could say they didn't care, as long as she had that powerful body. She felt like a goddess.