The Devil’s Contract

Is this... the right thing to do? "Is it really that hard to decide?" Yerim grabbed my wrists and pulled, causing me to tumble onto the bed. Her strength was weak, but she possessed a charm so potent I couldn't resist. As I fell, pinning her beneath me, I could feel her breath—a scent like sweet fruit. It was the first time I’d been this close to Yerim for so long. Her breath tickled my chin softly. Her crimson lips parted, and she asked, "If it's hard to decide, shall I help you?" Yerim flicked her tongue around her lips. Why did she need to moisten them? A kiss? Was it a kiss? I squeezed my eyes shut, but my expectations were shattered.

She placed her hands on my waist and pulled my pants down in one swift motion. My underwear came down with them, and my "junior" caught on the fabric for a second before springing up with vigor. "You say you don't want to, but your body is quite honest, isn't it?" "Wait, hold on, why are you suddenly taking my pants off... there’s supposed to be a process, a sequence..." She didn't listen, sliding down toward my lower half. As her face reached my crotch, she planted a soft kiss on the tip of my fully aroused member. The moist, soft sensation made me swell until it almost hurt. "Oppa, don't move, just stay still. It's my first time performing fellatio too..."

As I remained in that prone position, Yerim parted her lips slightly and took ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠me in. Her teeth didn't touch me; only her plump lips stimulated my member as she slid down to the root. She coated me in plenty of saliva, moving up and down in a slow, rhythmic motion. The sensation was so intense, so new! I barely managed to suppress the urge to explode. "If you send me away now, don't you think you'll regret it?" Yerim stopped, pulled back up, and asked with a bashful smile. The lipstick smeared at the corner of her mouth was incredibly erotic. "Right? You aren't going to send me away, are you?"

When I couldn't answer, Yerim changed positions. She had me lie back, knelt between my legs, and swept her hair—which had been getting in the way—behind her ears. Then, a bright smile. That look... it really looks just like Yerim... Yerim locked eyes with me and began kissing the area around my thighs. She sucked gently, leaving countless lipstick marks. A moan escaped my lips before I could stop it. She resumed the fellatio. Her eyes, slightly rolled back, met mine, heightening the pleasure. Up and down. She traced the veins between the glans and the shaft with her tongue, or flicked the tip of my urethra. The urge to climax surged rapidly. "Wasting it in my mouth would be a shame, so no." Just before I was about to go, Yerim pulled away and smiled. A sticky thread of saliva stretched between her lips and my glans. Yerim wiped it away with her slender fingers, brought them to her mouth, and swallowed it all. Damn it, this is a nightmare! There’s no way Yerim is this kind of lewd woman!

"Oppa... you like keeping your top on during sex, don't you?" Yerim didn't take off her turtleneck, just rolled it up until her navel was exposed. A concave navel, a slender waist. And below that, a smooth, hairless mound... Wait? No hair? "Hold on, you're a natural, right...? Aren't you?" "Hmm? No. The real Yerim waxed because her ex-boyfriend said it felt better. I tried it and it was so comfortable, so I kept doing it?" I don't want to know! And why are you in a cowgirl position?! I like missionary!

"Ah, missionary is good too, but for the first time, I'll take the lead and move on top." Saying that, Yerim carefully climbed onto me. She moved her hips to align her mound with my member, then lowered herself without hesitation. "Haaah... ah..." I watched my own flesh disappear into Yerim, feeling a strange sense of sadness (though the sensation was admittedly great). Wait, though. There’s blood. What is this? I can see foamy blood at the point of entry. Wait, didn't she say she was a demon? What is this? Yerim blushed and spoke shyly. "I... actually, I've only ever made men have erotic dreams. This is my first time having real sex with my body. It does hurt a little."

Huh? So is she a virgin or not? If the mind, technique, and body aren't all virgin, you can't call it a perfect virgin, but... half-virgin? No, but is it okay to break a hymen so wastefully?? "If you want, I can make it again later." I shut my mouth. A demon is a demon, after all. But watching her, for a first time, this succubus is... too skilled. She’s so different from the Yerim in my imagination. I thought Yerim would be modest, covering her face and asking me to turn off the lights because she was embarrassed, trembling with her long eyelashes as she asked me to go slow because it hurt! To think she’d be rotating her hips on her own after losing her virginity in a cowgirl position! I hate lewd women! Did she really read my tastes correctly? Nevertheless, my member stood stiffly, showing no signs of subsiding. The inside of Yerim (the succubus who claims to be Yerim) felt incomparably better than any onahole. Was the saying that handjobs feel better than sex all a lie? '...Wait, didn't she say she'd do it according to my tastes?' Is she just enjoying it all by herself? I should do something too! My sexual preference is for the partner to be in agony, as if they're about to cry. It’s convenient that Yerim is doing everything from A to Z, but the emotional satisfaction is lacking. In adult videos, when the man moves during the cowgirl position, the woman usually looks distressed. While Yerim was rotating her hips, I tried moving my lower body to match.

"Oppa, don't move. I told you I'd handle it..." What a damn woman! Yerim isn't that kind of person! I'll make this lewd woman gasp for air! I gritted my teeth, hugged Yerim's waist tightly, and pressed her mound firmly against my crotch. As I thrust my hips from side to side with force, her smooth vulva and clitoris rubbed against my rough lower body. Yerim let out a sweet scream. "Awoo, Oppa, it feels good... ah... thrust harder!" Yerim pressed her snow-white buttocks down even harder. Not content with that, she pressed her breasts against my body. The sweat from my body soaked into Yerim's black turtleneck, and the firm sensation pressed down on me. 'Was she still wearing a bra?' While Yerim was busy seeking pleasure by rubbing her lower half, I reached behind her back, trying to unhook her bra. Yerim giggled, tickled by my fingers brushing against her back. 'How to not look like a virgin- unhooking a bra with one hand... that's what they said.'

I fumbled around the hook with one hand, but the hook only came undone on one side and got tangled, refusing to fall off. Damn it, I don't want to be treated like a virgin! Yerim slowly raised her body. Her lower half kept moving, searching for stimulation. "Oppa, I know you're a first-timer. Even if I hadn't read your memories, I'd know this much." Yerim reached both hands behind her back and carefully unhooked it. The black lace bra fell off the bed, and her heavy breasts swayed as they dropped. When she leaned her hands against my head and thrust her chest before my eyes, the bra marks that looked like bindings on her sides caught my attention. Pale skin, light pink bra marks, and nipples standing up adorably. It was a truly perfect set of breasts. "Please... torment my breasts too." Her acting shy is terrible, but the dialogue itself is fine. The white skin contrasted with the black turtleneck rolled up above her breasts. Like the moon in the night sky... I raised both hands and squeezed them gently. When I pinched her nipples slightly with my fingers, Yerim’s waist trembled. "Ah, Oppa, it feels good... it's okay to do it harder." As I rolled her nipples between my fingers, Yerim bit her lip and drove her hips down even harder. She seemed to have reached the peak of excitement. Squeezing harder, then gently. The soft sensation filling my hands made me even more excited. I felt like I was going to finish at any moment.

"Oppa... you're about to go, right? It's okay to finish inside...!" Wait, she said it's okay to finish inside? What if she gets pregnant? I completely forgot that the Yerim in front of me was a demon. The educational materials I'd seen from school seniors and countless media outlets—that finishing inside is a disaster—scrambled my brain. 'No finishing inside!' Just as I was about to pull out before climaxing, Yerim panicked and pressed me down hard with her hips. "Why waste it by finishing outside! Hurry up and finish inside! Being finished inside by a man... that was my dream!" Yerim gasped, scolding me, and tightened her vaginal ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠walls. She squeezed tighter than any hand-finish could. "Ah, ah, ah...! Kangmin-oppa, ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠I, I'm going! Finish inside, finish inside!"

And my mind felt like it was exploding with excitement. To think that the Yerim I love was accepting my internal ejaculation, her beautiful face distorted by pleasure. Semen erupted from the tip of my glans. I could feel the fluid being drained from the base of my testicles. I pumped it deep inside her, over and over. To think that finishing inside a girl I’ve had a crush on could feel this happy. I hugged Yerim, who was leaning against my body, and thrust deep, as if to spray every last drop. "Oppa, that felt so good." Yerim kissed my cheek and rolled to the side. As my member slid out and the white fluid leaked out, Yerim covered her crotch. "Aigoo, what a waste." ...What a... beyond vulgar... what a terrible act... Noticing my gaze, Yerim propped her chin on her hands, lying prone, and chattered away at me. "Oppa, how did it feel?" Well... honestly... it felt really good. "It felt good, right? You want to do it again, don't you? But if you want to have sex with me again..."

With a confident attitude, Yerim produced a piece of paper from nowhere. What is this? It’s a blood-red contract written in cursive Hangul. An ominous feeling permeated the air. "Hmm, this sex was just a sample. If you just put your thumbprint on this contract, you can ravage me to your heart's content from now on. I'll lick you from your toes to the top of your head." A contract? What kind of contract do I have to sign? The service she added at the end is a bit intriguing, but I don't want to sign a suspicious contract with a demon. "No, what kind of contract is it? Like Faust, taking my soul, something like that?" Yerim waved her hands frantically. "Aigoo, that's a completely unfair contract... we don't use those at all anymore! There's a standard contract now! Just put your stamp on it first. It's been a long time since a demon could cross over, so it's become much more favorable to the human side! Take a look!"

Oh. There really isn't much to it. "Are you sure there aren't any other clauses besides what I mentioned?" "Yes! That's right!" "Still... do I really have to?" When I pulled back slightly to test Shar's reaction, she looked like she was about to cry. "I wasn't going to say this, but please... I don't know how many hundreds of years it's been since the portal opened, but if I miss this, my turn won't come around again..." Yerim begged me with tears welling up in her eyes. "Please! I'll do absolutely anything you ask! Please sign a contract with me! I really don't want to go back to the Demon Realm! If I can't get your stamp, I have to go back to the Demon Realm by today... please. Kangmin-oppa." Oh, this crying, begging look is really nice... Yerim begging me... But does that mean there are other succubi? And now that I've done it once, I'm thinking... if I could really meet Yerim and make things ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠work... wouldn't that be much happier than being with Shar? When I showed signs of hesitation, Yerim suddenly began desperately appealing to her sales points. "Okay! This is a secret specialty I've never shown anyone else, but for Oppa, I can even do this!" As Yerim reached for my wilted member, it suddenly grew. It wasn't just blood rushing to it; the actual physical size increased. It was the size of a travel toothpaste, but suddenly it grew to the size of a banana... it's getting even bigger? Wait! I looked at my crotch and lost my words. This is really... the size of a paper towel roll core?

"If you have sex with me, you can have this kind of massive size-" "Let's sign it right now." I reached out as if possessed and pressed my thumbprint. A stinging sensation passed through my hand, and it was stamped in blood. Should I have done this sooner? A look appeared on Shar's face that suggested she wondered why I took the long way around when there was an easy path. But this is a serious problem for me! Even before this, I was a "paper towel core free-pass," so I had a lot of worries... "Well, anyway, the contract is established! By the way, would you like to test it once?" Yerim tapped my massive member, now the size of a baby's forearm, with her finger. Blood rushed to it in an instant. Yerim lying there, smiling with the face I fell in love with, white fluid leaking from between her legs. She’s tempting me to do it one more time. How could I say no? "Wait, but before we do..." What is it? What is she trying to do?