James, a depressed college dropout.

I wake up in silence, looks like I slept through all my alarms again.

I groan as the sour stench of old milk hits me. Shit. I forgot to throw away the last of the supersize milkshake I had for dinner last night.

I try not to make noise as I move through the remnants of the past few days’ worth of fast-food wrappers and other trash. Not that I'm at risk of waking anyone up; the clock reads 1:30 pm. I just don't want anyone who might still be in the house to know exactly how late I slept in today.

Not that it really matters. I could sleep in for another three hours and nothing would change. All that really matters is that I look presentable when mom gets home from work. If I clean my room and shower today maybe she won't ask how my job search is going.

But before that, I still have a few hours before she gets back, might as well kill some time.

I fish my phone out of the cocoon of my blankets and scroll through notifications.

A snap (from team snapchat, of course), a new upload from a YouTuber I watch sometimes, an deluge of ads and promotions, and a a few memes and updates in some of the groupchats I'm still in.

It's been a while since anyone outside family bothered to talk to me. I'll reach out once I get a job or something. Need to make it seem like I left college on purpose. I instinctively think to launch League to kill a couple hours, but my long string of losses from last night puts me off the idea.

TikTok it is, then. I swipe through videos for a few minutes when an ad, of all things, catches my eye – "Custom Girls" The ads make it seem like some perverted hentai game. Looks like even the ad algorithm knows what a loser I am. Still, the art has my interest. If it's on the app store it's probably safe, right?

I click through and install the app. The tutorial is boring, but the art is good enough I go ahead and finish it anyway. The concept of the game is that I complete levels to earn gems, then I spend gems on unlocking and upgrading "girls." Once I get through the tutorial the game magnanimously gives me 10 gems and 250 gold, I assume they'll eventually try to rope me into spending real money on these, but I might as well spend what I have before I uninstall.

There's only one girl I can unlock - Heather Venti.

My heart raced. That’s... my sister’s name. How?

This doesn't make any sense, how could the app know her name, even if it were a virus there shouldn't be a way for it to know who's in the house with me.

Still, it probably won't get any worse if I check out her profile.

Even worse than the app somehow knowing her name, it somehow knows what she looks like. The avatar mirrored her – dirty blonde hair and slim build, it even gets the details of her face right. swaying back and forth and fidgeting like game characters do. I felt lightheaded, not even a virus should be able to do this, someone must be messing with me.

As I scroll through her profile, I'm greeted with multiple tabs presumably representing different categories of upgrades I can buy. I'm looking at "body" upgrades. Just like I suspected it's mostly perverted stuff. I can make her breasts bigger for two gems, grow her butt or thighs, make her taller or shorter or change her hair color. There's some even weirder stuff down the list but most of it is too expensive for me anyway. There's also a checkbox for "awareness" apparently for if I want to see the avatar react to my upgrades.

I feel a stirring in my pants. I know it's wrong, but this is probably what happens when you don't see another woman for three months, the idea of altering my sister's avatar is actually getting me exited. Before I have the chance to think better, I buy all the upgrades I can afford for Heather; I can increase her breast size twice for 5 gems and then grow her butt and thighs for 2 and 3 gems respectively. Now the avatar is a little more to my liking.

My dick is already hard, might as well beat off before I get rid of the app. I head over to my cluttered desk and reach for my trusty lotion bottle.

I bust in around two minutes. I catch most of the mess in a tissue, but I decide to venture out to the bathroom to wash my hands anyway.

What I see in the hallway makes me feel like I'm about to pass out. Three monsters a day isn't good for the heart, and it feels like mine is about to explode.

I see Heather, but.... not Heather. Her jean shorts are straining to hold in her new huge butt and thick thighs, and her now very generous breasts are about to fall out of her shirt. I try my best to hide my shock, but she gives me a weird look anyway. Granted, she might just smell the jizz on my hand, but either way it doesn't really matter.

I don't bother washing my hands. I sit on the toilet, mind racing, and think. It looks like the app can actually change people.