Img source: https://www.pixiv.net/en/artworks/50693993
Artist: うっぴゅる
I think I might have accidentally made this one too dang long, oh well.
Considering the length I had to try a type of layout I haven't really tried before, though it coincidentally comes close to the one I used on Failed Vengeance, a character from which happens to also feature in this one.
"Hey Mallory, wanna go somewhere fun~?"
"... Please don't tell me you've found another supposedly haunted place you want to drag me into."
"Of course I did. Life'd be boring if I didn't get to see you trying to act all stoic while you're really terrified."
"What even makes you think I'm scared of those places? Nothing ever even happens while exploring them."
"You got bitten by a rat that one time."
"First of all, it was supposed to be "infested" with ghosts, not rodents. Second of all, you threw the bloody thing at me! No, I'm done with this, I- Too late, we're here~"
Mallory and Ava stop in front of the dilapidated little apartment building. He and his classmate were supposed to be on their way to the bus stop. But it seems that she had led him to her newest haunted house while distracting him.
"Dammit Ava, now we'll miss class again thanks to your crap!"
"What a shame~ Better never than late though, so let's go!"
Laughing, Ava begins to drag the reluctant Mallory straight towards the broken window. She clears some of the glass out of the way, reaches inside, and opens the window. Without waiting for Mallory, she then hops in.
After hesitating for a moment, Mallory follows her. Inside, they end up in an old laundry room, it clearly hasn't been touched in years. Even the brick on the floor which presumably smashed the window somewhere in the past has a thick layer of dust.
Ava looks around a bit, and continues towards the door, brushing the cobwebs in the way aside. She smirks as she and Mallory enter the stair room.
"I thought you weren't coming with me today?"
Mallory sighs before he replies. "Not like I could still catch our bus, and the next one isn't coming for another thirty minutes."
"Pretty sure I've heard you say that before. But I suppose you just can't admit that you enjoy this just as much.. as..."
Ava goes quiet as they walk into a housing unit on the first floor. It's fairly well lit due to the curtains being open. There's broken glass, furniture and other old possessions all over the place. But somehow, there doesn't seem to be any dust or spiderwebs whatsoever.
Strangest of all, there is a large, perfectly round hole in the ceiling. It's much darker in the room above, so they can't see well into it. But there seems to be some sort of faint lights moving around.
"Holy shit what is that!?" Excitedly, she immediately runs out the room and up the stairs. "Huh?? E-Eva wait!"
He quickly rushes after her. At the top of the stairs, he sees the door to the room they had seen from below already open. Ava had probably gone in already, so he follows. As soon as he enters, the door slams shut behind him.
He yells in surprise, and stumbles backwards as something begins loudly banging the door from the other side. One by one, five pink faintly glowing ghastly things emerge, and fly into him. A strange warm sensation shoots through his body.
His body begins to shrink in length, and his shoulders awkwardly narrow down as his hips begin to widen. Noticing his body somehow changing, he panics and frantically goes to look for a way out of the room. Meanwhile his body continues changing as his skin softens and most of his body hair vanishes.
The feeling of his smooth skin rubbing against his clothes makes him blush slightly at how sensitive it is becoming. Eventually he finds another door, and enters a bathroom through it. There doesn't seem to be a way out there either, but he does find a mirror.
And there is just enough light shining in through the blinds for him to be able to see himself in the mirror. It takes him a moment to realise, but his facial features seem to have gradually been changing too, giving him an undeniably feminine appearance.
Two of the wisps then float out of his body again. They emanate a faint whispering sound, but no words can be made out. They then begin flying through his clothes, tickling him and disintegrating his clothes where they touch, causing him to yelp in an uncharacteristically feminine tone.
Within only a few moments he is left naked as the remains of his clothes fall to the floor. Seeming satisfied, the two wisps fly into his chest, prompting a pleasurable pressure to begin building up in his chest.
He lets out a soft moan as a fairly large set of breasts balloon out from his chest, and his nipples and areolas rapidly expand in size and sensitivity. Panting softly, he resists the temptation to grab them and play with them. His attention is then brought to his lower body.
His ass and his legs plump up similarly, and an intensely pleasurable sensation spreads through his crotch as his dick begins to shrink and shorten. In the lusty haze that has finally overtaken him, he only giggles softly as his penis fully retracts into her new dripping slit.
For a moment it seems like her transformation is over, but just as she is about to begin exploring her new body, her belly begins to feel off. It then begins pushing outwards and growing taut. She instinctively holds her belly as it continues expanding, quickly making her look pregnant, only for a sudden kick from inside to confirm it.
Her tits and nipples then start engorging further until milk starts dribbling from them. The heavily pregnant woman tentatively brings her hand to her crotch. And just before her finger can slip into her wanting sex, a loud crash snaps her out of it as the door is finally opened.
"Mallory!? Mallory what the hell is-?" Ava runs in, and quickly finds her way into the bathroom, where she finds Mallory. "No way... Mallory is... that's you, isn't it?"
Blushing brightly, Mallory slowly answers. "Y-yeah..? I uh.. think you were right about this one..." Ava quickly finds a bathrobe hanging off the wall, and hands it to Mallory, who slowly puts it on.
"You mean this place was like, actually haunted then?.."
"Yeah, there were these five little ghost things." While she speaks, four of the wisp like things fly out from his body, making the same soft noise as before.
"Oh..? Uh... one of them just told me my uh, name should be Mara now..." Mara seems oddly unbothered by the situation.
"What, really? I don't hear- Hold up, those things did that to you?!" Ava steps back and seems ready to run away at any moment.
"I don't think they'll attack you too. ... Actually, it seems they can't. Turning me into... their way to come back to life used all the energy they built up over the last twenty years. You... can leave now if you want. I think I'll be fine~"
"A-are you sure Mallory? You're acting really strange..." Mara laughs awkwardly, and rubs her wet thighs together slightly.
"This body just feels really good. I... need to... y'know, some private time~" Ava blushes brightly.
"O-okay. I uh, guess you have fun with your new body then?"
"Mm, see you later, and... tell the lecturer I'm sick for me if you can."
The sound of moans begins to come out of the room only a few moments after Ava leaves. She begins walking in the direction of their original destination. She didn't believe ghosts could actually exist. The fact that someone's body could be altered like that wasn't completely new to her.
But now that she had actually seen it first-hand, it was the hottest thing she had ever seen. As she walked, she couldn't help but think about ways she might get to see it again. And one thing that came to mind was her father's research, which she knew he kept some notes and records of at home...