Arnold walked in with a pile of letters, the otter noticing his panther roommate lying down on the couch watching something on the television.

"Anything interesting on today?" Arnold asked as he took a seat across from him on the other couch.

"Eh, it's mostly reruns." Peter responded, sitting up once the otter took a seat. "Did we get anything aside from junk mail? I swear they've sent that credit card offer like three times a week."

"Well, that quota is still here because there's one of those." Arnold said with a laugh. "But there is actually something, an invite."

"Invite? For what?"

"Let's find out. The rest of this looks junk anyway." Arnold said, throwing the other envelopes aside for the much more interesting one. "Mindy's having a pool party by the looks of it, and we're both invited...and..." he paused for a moment.

"And what?" Peter raised an eyebrow in both intrigue and confusion.

"If we finally found girlfriends we can bring them too." Arnold sighed. "Dang, that's a cold way to put it."

"No kidding..." Peter nodded. "It's not like we haven't been trying! Dating apps are hard to match on!"

"I'm sure she didn't mean for it to sting but yeah, that one hurt a bit." Arnold gave a dry chuckle.

"One day we will, eventually. This kind of thing takes time!"

"I wish I had a date to take to the pool party! Maybe she'd actually get into the water unlike you." he smirked at his roommate.

"Hey! You're an aquatic animal! Your body is built for water! I have to spend hours drying off this fur and then I'm all poofy for hours."

"Yeah yeah, right." Arnold laughed, though the laugh started to fade away. "Uh...dude?"

"What's uP?" he questioned, his voice cracking as he brought a hand up to it.

"You're glowing!" Arnold pointed at the panther.

"I am? I am!" he looked down and squealed, the squeal sounding much higher pitched and...feminine than it was supposed to sound. "What's happening to me!?"

"I don't know I..." Arnold paused, looking down at Peter's chest with a blush.

"What are you looking...at..." Peter questioned, his gaze traveling down to notice that two bumps started to bud out from his chest, and combined with his voice he knew exactly what they were.

"Why am I growing boobs!? I'm turning into a girl!" he squeaked out, the changes to his body starting to amplify in speed as the panther's entire body would alter into something new entirely.

Peter's face started to enlarge, namely at the muzzle as the panther's snout became much wider, all while the length of it grew longer as well. The shape of his nose became a bit larger while the black coloration of it darkened to a midnight black. The ears at the top of his head rapidly shrank, not stopping until they vanished into two simple holes on his head, Peter no longer possessing a set of ears, though the holes that remained would act as enough for Peter to still be capable of hearing.

As for the rest of Peter's head, the fur on it started to recede back into his head, revealing the skin underneath it. It was a bit rough to the touch, and a light gray color around most of his head, though around the eyes and lower half of the muzzle was a color closer to white instead.

Peter's eyelashes elongated and multiplied, starting to give his face a much more feminine look to go with the feminine voice that was escaping out from his muzzle earlier. Speaking of, at the end of his muzzles thin hairs sprouted out to give him a set of whiskers. Peter's eyebrows on the other hand would lose mass as they became pencil thin, completing the womanly look to his head.

This trend continued down his body as Peter's transformation continued. Like his head before, the fur vanished on his body as now appearing as though he never had fur in the first place. Like his head, most of it would be the pale white color, although his backside and hips would be a darker shade of gray. All along the sides of Peter's body, black specs formed to give him a bit of a spotted look to him, though his new skin was mostly two solid colors, any trace of fur gone from Peter's body.

As for his tail, it became much thicker, especially at the base and that width kept its trait until the tip, where instead it flared out into triangular shapes. The underside of the tail was white with gray on the top as block spots speckled all over it.

Peter's shoulders would lose their broadness, being traded off in favor of a much more narrow build instead. The mass on his arms was lost, taking on a much more slender shape. The size of his hands shrank down a decent bit, although the length of his fingers grew longer while they became thinner, Peter's hands taking on more dainty traits.

The growth of breasts finished developing from earlier, blossoming into a rather bountiful bosom as a larger pair of breasts now resided on Peter's chest. This was further amplified by his back pushing inward to form a curvature there to give it an arch. Similarly, the sides of Peter's body sucked in, giving his upper body the start of an hourglass figure.

This continued below the waist, as Peter's hips swelled outward, enlarging into wide, childbearing proportions. His rear followed in suit, puffing out and becoming more pert and pronounced. Between his legs, Peter's manhood slipped away until there was nothing but a flat opening in its wake. Internally, what was once an external reproductive system transitioned into an internal one as estrogen rapidly overwrote the testosterone in his body to swap his sex to a woman.

The last bit of changes came to Peter's legs. His thighs grew wider and his calves quickly followed. The curvature of his legs became more noticeable, especially near the thighs and hips to give his legs a shapely tone. The retractable claws on the former panther's body would be permanently out, dulled and black. The digits on his paws became flatter and thinner as well, all while his shoe size shrank down with his feet a few full numbers, ending the panther man's physical transformation into a seal woman.

The changes didn't quite end there though, with Peter's outfit coming to life to alter to better fit on his new form. Underneath his tee shirt, an entirely new article of clothing formed that would support his new breasts. It had thin straps hanging on the shoulders along with one across his back with two cups at the front that his bosom found a home in as he now sported a bra. His boxers rode upward, becoming thinner and shorter, shifting into a more triangular shape as they went from boxers to panties. His pants tightened around his body slightly, hugging his new curves a bit more for a bit of a snug set. Lastly, the sleeves of his shirt rode up his arms, not stopping until they were but thin spaghetti straps resting on his shoulders. The collar dipped down drastically, all the way down to his chest, causing a slight amount of cleavage to be shown off. The lower cut of it rode up as well, revealing a bit of midriff as his tee shirt became a casual tank top.

Around the panther turned seal and otter, the very apartment they were in was altering as well. Any traces of Peter's old form were vanishing, replaced with that of his new form. His old clothing was gone, with his wardrobe now filled with women's clothing along with underwear, and one of his old drawers dedicated to jackets replaced with nothing but bras. Inside the closet, much more outfits found themselves of the woman variety, including dresses and skirts along with various casual getups.

More feminine products appeared throughout the house along with the bathroom, and the apartment was a bit neater as well. The pictures altered drastically, with them being replaced with a panther in a panther family with one in a seal family, though outside of being a different species they all appeared to be the same. More notable would be the pictures of Peter with Arnold. There weren't many of them before, however, there were a lot more in the apartment now, and not just that, they were a lot more...romantic in nature. There were some of the two kissing, others simply smiling at the camera in a lot more than just a "friendly" way, instead having love.

"I...I think it's over..." Arnold commented slowly as the reality started to settle in place.

"Wh-what happened to me? Gosh, this feels so breezy and exposing!" Peter blushed looking down, seeing that his new bosom blocked some of the path down as curious hands went up to them, letting out an "eep."

"Y-yeah, those are certainly real." Peter pulled his hands away as he felt the rest of his curves.

"I think...the whole world changed, check this out." he said, reaching over for a purse. "This wasn't here before, looks like there's a wallet and stuff in here too."

"Give me that!" Peter snatched it from his friend. "It has to be mine, I can't see anything that used to be mine here! That used to be my backpack!"

"The one you never used?"

"That's beside the point!" Peter said, digging through it and pulling out a wallet.

The ID inside looked just like his new body, reading the name "Patricia" instead of Peter. He was still the same age and even height, though the rest was different.

"Guess my name is Patricia now?" the seal raised an eyebrow as she put it back into the purse.

"Not according to my phone you aren't. You're just known as "babe."

"That's weird...I wonder..." Peter rummaged through the purse and found his phone, and unlocking it showed a home screen of Arnold giving him a kiss on the cheek while she smiled. "Yup...I think in this world."

"We're a couple." Arnold finished the sentence. He got up and walked over to the invitation to the pool party from earlier.

"Did that change at all?"

"Yeah, it says that "you two lovebirds are invited" this time. Looking at all these pictures, it looks like everyone just thinks it's always been this way!"

"This is so much to take in." Peter said, rubbing his temples to try and calm down, though it was a bit hard when his very place in the world was suddenly replaced by someone of a different species and gender!

"How about this, we go to the pool party, have a good time, then after we can try and figure out what's going on."

"You want me to go out like this?!" Peter squealed with a blush.

"You're still you up there, and I know you were excited. Just because you're a girl and apparently my girlfriend doesn't mean we can't go have a good time!"

"We're going to have to pretend to actually be a couple. Don't want anyone thinking anything weird is going on." Peter replied. "And I have to admit, now that I'm actually an aquatic animal I do wonder how different swimming will be."

"And you get to wear a bikini!"

"I can tell that you're really liking me being like this." Peter answered dryly.

"Hey, I'm still you're friend, I got to be honest with you, and that body the universe decided to give you is a good one!"

"T-thanks." Peter said with a bashful smile. Despite the oddity, the compliment felt...really nice, especially coming from someone close to him.

"A-anyways, I'm going to go get changed. I guess we better start calling me Patricia so that we don't let any names slip."

"You got it Patricia." Arnold nodded and snapped his fingers. "I'll go get changed. Wonder if any of my stuff changed..."

Arnold left Patricia alone as she turned to go back to her room. It was strange, she had said to call her Patricia for the sake of others, but it felt good to her, almost natural even. Even outside of Arnold's company, she was thinking of herself as Patricia instead of Peter, the name just worked much better than her old one!

Upon entering her room, the seal was greeted with a drastically different one from the one she woke up in. She now possessed a small vanity stand in the corner of her room, filled with various mirrors, make-ups, and brushes. Patricia walked over to her closet, of which was a decent bit bigger of a wardrobe than before. There were a lot more options she had, with heels now among the sandals and shoes - of which were now fitting for her new body.

Patricia's eyes darted around the closet, eventually spotting swimwear, a cute pink two-piece bikini. "Well, here goes nothing..." Patricia said to herself as she took off her current clothing, slipping into the bottoms and tying the bikini top over her chest. It was as if she'd done it hundreds of times as opposed to being the first time she put one on, something she was thankful for. She didn't want to have to learn to put on underwear in her twenties after all!

Patricia still had her full-body mirror from before, and got a look at her reflection for the first time. She had to admit, for all the possible transformations there could have been, ending up like this was far from the worst scenario. If the roles were switched and Arnold was the one in this body, Patricia had to admit she'd enjoy seeing it in a bikini!

"Wow...I look really good." Patricia admitted with a smile as she did a few poses in the mirror and admired her reflection.

"Patricia! You almost done in there? You've been in there for a lot longer than you should!" Arnold called from the other side of the door.

"Oh! Yeah! Start the car and I'll be right out!" Patricia answered, hearing the footsteps walking away.

Patricia took a final look at her reflection with a smile, this was going to be fun! With newfound energy, the new seal woman left the room and apartment, heading off to the pool party with Arnold.

The pool party went by a bit awkwardly at first, with Arnold and Patricia sharing a few awkward muzzle kisses while holding hands as to not confuse the rest of the party who were none the wiser about the truth. However, over time these became a lot less awkward and a lot more natural, the two falling into the groove of a couple. Patricia got to enjoy some swimming and she had to admit - it felt much better in a body built for the water compared to when she was just a panther! Eventually, the party started to wind down and after the two's swimsuits were dried off, they said their goodbye to the host who wished them well as they returned back to the apartment.

"What a party, huh?" Arnold said, tossing the keys down and plopping down on the couch.

"Good thing you're dry or else I'd have to be mad you're on the couch." Patricia gave a small giggle as she sat down next to them. "But yeah, that was a lot of fun."

"Yeah, it was a lot more fun with a date than well...you know." Arnold rubbed the back of his head.

"Yeah, I had way more fun than I would have before this whole...everything happened."

"I wish I turned into an aquatic animal sooner, that swimming felt amazing!"

"You looked like a natural." Arnold laughed. "If I didn't know any better I would have guessed you'd be able to swim like that your whole life!"

"It feels like I did! I guess with the reality changing I still grew up in this body, so maybe I was a part of the swim team in high school or something!"

"I guess we can figure that out eventually. Who knows how much changed with you...with us..." Arnold blushed as a silence fell over the room.

"So...what do we do now? Should we try and figure out why you changed?" Arnold broke the silence.

"We could..." Patricia paused. "Or might I suggest something I know we'd both enjoy a lot more?"

"What might that be?" Arnold questioned with a raised eyebrow and a knowing smirk, slowly sitting up straight so that Patricia would be able to do whatever it was she wanted.

"Let me lead the way then, babe~" Patricia said, wrapping her arms around Arnold's neck and smiling. The two looked lovingly in each other's eyes as they muzzles interlocked, with Arnold wrapping his own arms around Patricia as the seal gently fell on top of the otter, sharing a passionate kiss as the two began to make out.

From that day on, the reality that Arnold and Patricia found themselves in was simply the default. Though they were curious why what happened occurred, eventually, the search became too uninteresting for either to care. Instead, they were just happy that this was what happened. The two were soulmates, and didn't want to jeopardize anything changing should they find a way to undo the magic - and they didn't need magic when the magic was their relationship itself!

They kept attending parties together, becoming the longest-lasting couple among all of their friends, much to everyone's joy as they enjoyed everyone's company. During a private date, Arnold even wound up proposing, to which Patricia happily accepted. It got to a point where the two didn't even realize that anything was different, not because they forgot but because they didn't want to think about life before the two got together. They shared many adventures in the future, growing closer as a couple, and they wouldn't have it any other way.