Published: Dec 14, 2024

My one-hundred and seventy sixth caption, featuring a sub-par doctor who becomes an above-par succubus…

All image credits go to Riko-C105. I claim no ownership over the image used. Please support the artist!

All image credits go to their respective artists. I have and never will claim ownership over any image I've used or modified for a caption, and I always encourage you to check out the artist and their wider body of work when possible.

When Dr. Loveless had originally begun experimenting with magic to bolster his… less than average skills in chemistry, he never imagined things would lead to where they were now. In a vain attempt to produce an anti-aging formula, one that would boost Dr. Loveless’ profile to stardom and make him filthy rich, he had accidentally stumbled upon a far different kind of formula. This formula, combined with his poor adherence to basic safety protocols and butter fingers, led to him getting a face full of the pink stuff.

The magically-infused mixture worked incredibly fast, absorbing into the doctor’s skin and immediately infusing him with dark energies. As it turned out, not only was the doctor bad at chemistry, but they were also bad at magic too. Instead of drawing energy from a “holy source” for his runes, he had unknowingly tapped into demonic energy sources instead. Without warning, their body began to burn, every nerve ending crying out in pain and confusion as they began to shrink in size, going from 6’1” to a measly 4’9”. His hips popped outwards, giving him rather… feminine proportions. As it turned out, that was no coincidence. Without warning, his manhood shot back up into him, feeling like a punch to the gut as his shaft inverted, becoming a virgin vagina while his testicles became ovaries, already kicking into overdrive. The rest of him, now her, continued to become thinner and more petite while hair exploded from her scalp, styling itself into a pair of stereotypically bratty twintails. That wasn’t all, though. As her eyes took on a bright pink glow, a thin, wispy tail erupted from her tailbone, topped off by two little thin bat wings. Dr. Loveless was gone, and in his place was the newly-minted Vyllyn, succubus doctor.

Dr. Vyllyn wasted no time mounting her research assistant, who had just gotten back from fetching more supplies. Though Dr. Loveless was gone in the physical sense, his mind, knowledge, and desires remained, though overcharged with a newfound sense of succubus lust. Her assistant, initially hesitant, was quickly won over by her “charms”, grabbing her by her thin waist and having his way with her. Her smaller size meant it was easier for her to be manhandled, and she loved every single second he held her tightly against a table.

Finally ejaculating inside of her, Dr. Vyllyn felt a surge of addictive power rush through her, causing her to scream out in ecstasy. As this happened, her assistant fell limp, his lifeforce being sucked up into her. Dr. Vyllyn initially panicked, thinking he had died, but checking for his heartbeat and breathing revealed he was simply passed out. Disappointed, the succubus pouted, crossing her arms across her flat chest. It was at this point a new, devious idea crossed into her head as she walked over to her chemistry station and immediately began working on a new formula. Her head swirled with new, perverse ideas as she worked, eventually “fixing” her runes and pumping out a new pink liquid.

Luckily for Dr. Vyllyn, there was a group of male volunteers coming in the next day for clinical testing. Giving her groggy, weakened assistant a box of apple juice and a slap on the ass, she ordered him out front to begin sending in the lovely little morsels. Over the next few hours, she’d test her “new and improved” formula on the shocked and surprised individuals, turning each of the varied men into gorgeous, beautiful women, though without the succubus traits Dr. Vyllyn herself possessed. Watching their shocked reactions as their muscles, facial hair, and dicks practically melted away, leaving them with big breasts, pear-shaped asses, and fresh, pink slits was beyond entertaining to the “doctor”. The truth was, Dr. Vyllyn was experimenting with these transformed women to see if they were capable of giving her the same vital life force that a man typically could. To say the least, the results had been…disappointing. These women could have easily pleased an incubus, but it seemed like girl-on-girl wasn’t capable of providing the same effects to her.

Dr. Vyllyn was about to give up as her final volunteer entered the room, a thin, wispy-looking man with a somewhat gaunt expression. She wasn’t impressed by him at all.

“So, you’re what I have to work with? I don’t see you becoming much.” She continued to pout, predicting that her fun for the day was over. “Sit down in the chair.”

“Uh… is that… standard workplace attire?” The confused young man questioned, referring to the swimsuit she was wearing. “You don’t look like a doctor…”

“No point in wearing a uniform if it’s going to come off anyways~” She joked, grabbing a syringe. “Just be still. You wouldn’t want me to miss the vein, would you?”

This final batch of the formula had been modified with two parts estrogen, one part testosterone, and an even stronger burst of arcane energies. Though Dr. Vyllyn wasn’t getting her hopes up, she did notice that the formula had a much stronger pink glow to it this time around. Wasting no time, she injected the pink liquid into the man’s bloodstream. Immediately, there was a bright, pink flash from the thin man, actually forcing Dr. Vyllyn to cover her eyes. Looking back at the man, she watched as, like the others, he shrunk slightly in size, though it wasn’t like there was much more of him that could shrink. His waist caved in sharply, causing a huge ass to explode from his pants as his shirt was torn apart by two, massive F-cup breasts. Dr. Vyllyn pouted for a moment, jealous of the new woman’s curves as her face became cute and petite, framed by long, messy black hair. It was at that moment she noticed something was… different about this one. Unlike the others, she noticed a large bulge was now straining against her tight, ruined pants. Dr. Vyllyn wasted zero time yanking them off with a loud RIIIP, revealing a huge, girthy cock. It was easily bigger than that of her assistant, and Dr. Vyllyn’s eyes lit up like a Christmas tree.

“Oh my! Wow!” Dr. Vyllyn beamed, holding her hands up to her cheeks in shock before pulling out a ruler. “You were hiding all of this?! It’s easily over a foot long!”

“W-What have you done to me?!” The buxom woman asked, panting heavily as her brain struggled to process all these new feelings and sensations.

Without another word, Dr. Vyllyn immediately ripped off her own swimsuit, revealing her petite features in full. She immediately mounted the thicc woman, coming close to an orgasm just from inserting the monster of a dick inside of her. A bulge was clearly seen on Dr. Vyllyn’s belly as she began moving up and down, causing her to bite her lip as the woman beneath her did the same, moaning softly as she too felt the pleasure of her new body. It didn’t take long for her to finish inside of Dr. Vyllyn, causing a flood of cum to pour from her, onto the chair and floor. Dr. Vyllyn basked in the afterglow, power flowing through her, much stronger than any man’s seed. She had done it.

“You’re perfect.” Dr. Vyllyn purred, planting a kiss on the exhausted woman’s cheek. “You interested in being my new assistant? I promise you won’t regret it~”