Her hair

What should we change next..? Lisa gave him a sly smile. She'd never been more turned on in her entire life, and she wanted more.
Finally getting his first proper look on Lisa's attire Jim could very well understand why she wanted more, it was incredible! Every single article of clothing suited her as if it had been tailor made. His only gripe was how the outfit emphasized how truly pudgy she'd gotten these past couple of years. He didn't want to bring this up now though, afraid of the potential backlash of telling his girlfriend she could lose some weight.

What about your hair? I mean, with your current outfit it really would make sense for your hair to match, no?

Hmm.. Lisa really liked her hair, it was practically her only truly flattering feature. She was by no means ugly, but her hair looked as though it belonged in a shampoo commercial, and she really treasured that fact. She could change anything about herself, so why change her one redeeming feature? Then again, it could always look better, and Jim did have a point, it didn't really match. And if she really hated it they could always just change it back, the site didn't seem to have a policy against that sort of thing

Fine, you can change my hair. But nothing too flashy, I'm still very fond of my hair, so maybe just change the color a little bit?

To be honest, Jim was just happy she went along with his first proposal. It's really a minefield when your girlfriend asks you what you would change about her. It's like a harder version of "Does these pants make my ass look fat?". No one can win in that scenario, yet Jim seemed to get away scot-free. Following her approval Jim got to typing out the change.

"My partner's hair doesn't match her style. If I could change her hair, I'd make it gothic". Upon entering the final letter he looked up at Lisa for her approval. Lisa gave a nod in response, satisfied with the way he'd phrased it.

As Jim hit enter there was again a slight delay before the now slightly more familiar waterslide-like trip. It didn't last as long this time however, probably because the change wasn't as impactful as the previous.
Once the trip cleared and reality had shifted back in it's rightful place Jim's eyes shot towards Lisa's hair.
A simple wow was all he could say.

Lisa on the other hand had some trouble seeing her boyfriend at first. Not realizing her hair now completely covered her eyes. Slightly panicked at this point Lisa's first line of action was to frantically move her head about, trying to "Shake" the world back into view. This in turn cleared her face of some hair and she understood that it was her hair that had prevented her from seeing. Did it also seem a little bit longer? Might have to find a new way to style my hair from now on she thought to herself.
After overcoming this little shock she could finally grab a strand of her new completely straight jet black hair. Pulling her fingers down along her hair it appeared to her that her tips were now a deep purple. Suddenly the only color on her entire outfit was in her hair, being a stark contrast to her otherwise completely black attire with the occasional silver.

This is awesome! I've wanted to dye my hair to match my outfits for the longest time, but I'm allergic to hair dye. This magic thingy must have made it natural or something!

..What? Jim asked with a perplexed look on his face. You don't remember not being goth??

Well duh, Of course I do. I didn't turn goth until like middle-school, before that I was as plain as any other girl my age I guess.

Jim was no longer perplexed, he was horrified. For some reason his girlfriend could only recall the most recent change made to her. If he wasn't careful with this thing she'd never be the same person again. Even if he were to change her back right now she'd still remember her life to be "Fake". Either being aware to have formerly been a goth, or at least having the hair of one. He reasoned it'd be best not to tell her. Knowing that she used to dress completely different from what she did now would only scare her. He didn't need that right now, he had to figure out what to do about this whole situation and a panicking girlfriend would NOT help.

Let's fuck! Lisa suddenly exclaimed. It was the first time Jim had ever seen her so eager, was this one of the side effects of suddenly becoming goth? Or was she turned on by being transformed? Either way, there was no way any sane man would turn down a request like that. Especially given the fact that she was dressed sexier than he'd ever seen her.

Lisa practically leaped into Jim's arms, wrapping her legs around him allowing him to carry her into the bedroom. Once in, he laid her on the bed and got to unbuckling his belt.

..Not yet, there's something I wanna get first. Lisa got off the bed and headed to a drawer in the closet. What she retrieved were three items Jim never knew she had, another side effect of her transformation? She came back with a jeweled butt plug, a rope which was only long enough to tie up either her hands or feet and a leash.
A fucking rope, are you sure?
What do you mean? You always tie me up one way or another. She gave him a suggestive wink as she handed him the rope.
Looking down at the rope Jim didn't really know what to do with it, this was all new to him despite his girlfriend having clear memories of being tied up by him. He awkwardly got to tying up her hands, attaching them to the barred headboard of the bed. Upon finishing this task Lisa made a request for the next. With her hands now tied she could no longer attach her leash and insert her butt plug. Apparently she liked it when Jim did those things for her. Not being one to argue about kinky stuff in the bedroom he complied.

What now? Jim didn't really know how to proceed at this point, given it was his "first time" in this new reality.
You grab my leash and you fuck your goth bitch stupid, silly! Fortunately for him, Lisa didn't catch is uncertainty about the whole situation, being completely overtaken by lust.

No need to ask twice Jim thought. He grabbed her leash and pulled with some minor ****, not really sure how forceful he should be. With the leash wrapped around his left hand, he assisted himself with the other. Inserting his member into her already very wet pussy.
What followed was the messiest, most feral session of sex Jim could ever recall having. Something about Lisa's attitude had shifted along with her new goth look. Being what could only be described as vulgar and depraved. She kept using degrading words when referring to herself such as Slut, bitch, cum slut, goth whore and so on.
As Jim neared what would be the final climax of the evening, now turned night he once again pulled out and blasted his load all over his depraved girlfriend's tits. At her request even. Immediately after he collapsed next to her on the bed next to her.
Do you want me to untie you now? Jim barely had the energy left to turn his head towards her as he waited for a response.
No, I think I might want to sleep like this tonight.. She had a dreamy look on her face, probably still riding the high of her latest orgasm.
It didn't take Jim any more convincing than that, not really sure how he should even being untying her at this point.
And so they fell asleep, Jim laying face down on the little space available next to his girlfriend, now drenched in drying cum, still tied to the headboard.

The following day was rather uneventful. Jim left early as he had morning classes and Lisa worked on one of her assignments from home. During the first of his lectures Jim received a notification on his phone.

Adequately Inadequate: Couples edition!™ download complete.

He definitely could not recall ever having downloaded such an app of his own volition. Thinking back on what had occurred the day prior he concluded it'd be the wisest to just forget about the app and never alter his girlfriend again. He could get by with having a more sexual and daring partner. The thought of going further than that terrified him

Nearing the end of the last lecture Jim was asked to join his boys to the bar. Thinking it would be a nice change of pace from the escapades of the previous night he gladly complied.
The bar was fortunately only one block away from campus. For this very reason most of it's patrons were students. Entering the bar it was relatively easy going, not usually a lot of people at this time of day. His group found an empty booth and hailed him towards the table.

Some guy named George who Jim hadn't really had the time to get properly acquainted with ordered the first round of beers. Then came Mike, then Justin. Following Justin came Roger's turn, and finally it was Jim's turn to order a round for the boys. At this point as one might have guessed the guys were getting quite intoxicated. Maybe it was the **** speaking, or maybe it was just George being an ass. Either way he started asking Jim about Lisa.
How come you're together with that porker dude? You're so fit, and she's just ..not. Don't get me wrong bro, she's not obese or anything. She's just kinda fat, y'know? And that sexy goth look? really? She really doesn't have the body to pull that off. You should break up with her and let us guys have a turn each, it's only fair.

Jim was furious, though never one for ****. He'd learnt at a young age to remove himself from situations like these and as such pardoned himself and left.

What a god damn asshole, he doesn't know half of what me and Lisa get up to. If he knew what she was like in the bedroom he'd keep his mouth shut. Jim murmured to himself, slurring most of the words as he was quite drunk at this point.

As he got on the bus he received yet another notification from the Adequately Inadequate app.

"Over twenty four hours have elapsed since the last submission was made. Prepare to receive behavioral modification to enforce compliance. Complete two changes within next twenty four hours to avoid further behavioral modifications"
After reading the notification Jim felt a sudden rush of adrenaline was over him.
Unsure whether it was the **** speaking or something else doing the thinking Jim found himself navigating through his phone to the newly installed application.
As he looked at the list of possible changes he could make to his girlfriend he wasn't overcome with the terror he'd felt just hours earlier. No, instead he felt arousal. he was being turned on by the thought of transforming his helpless girlfriend!

Scrolling down there was an option that caught his eye.