Crossover-Isekai 507

Chapter 507 Serafall*


Edited by: Kanaa-senpai


 After coming to terms with her own feelings, Serafall finally slowly regained her usual playful, bold style.


 In the dim bedroom shared by just the two of them, her actions grew bolder, gradually taking the initiative, displaying all the limited knowledge she had.


 The feminine fragrance drifting from behind, constantly seeping into his nose, was undeniably a powerful catalyst for desire.


 Aki’s inner flames surged. He wanted to just devour the schoolgirl behind him right then and there, but he couldn’t bear to give up this wonderful foot service and teasing temptation.


 Even though she and Sona Sitri were real sisters, Serafall seemed to have absorbed her sister’s share of nutrition. She possessed massive breasts far surpassing Sona’s.


 The plump softness pressed tightly against his spine. He could even faintly sense the two tiny, slightly hard tips.


 Because Aki had pulled it down earlier, Serafall hadn’t put it back on.


 Aki’s breathing instantly grew heavy. Little Aki (Aki’s member) swelled painfully, and he could only suck on Serafall’s fingers even more greedily – but the Demon King schoolgirl dexterously slipped her fingertips away at that moment.


 The frustrated hum just born in his throat was immediately swallowed by a kiss, wet and sweet like morning dew.


 One cheek was forced against him. Serafall seemed to be repaying her fingers’ treatment, treating Aki’s lips like some delicacy to savor thoroughly.


 The girl who had been passive and conservative just minutes ago was now cradling Aki’s face, licking and gently biting his lips. From behind, she slowly burrowed into his arms, her black-silk-stockinged elastic round ass pressing shamelessly against Little Aki (Aki’s member).


 Whatever the reason, faced with Serafall’s lewd, proactive display, Aki didn’t think twice – he decided to accept everything offered.


 Going along with her motion of straddling his legs, his hands naturally reached up to her thighs.


 The soft thigh flesh beneath the black silk stockings obediently transmitted body heat to his palms. Higher up was a tempting, firm, perky ass.


 Not rushing to make the gift-dressed girl let out unguarded moans, Aki just leisurely caressed her thigh roots.


 ”Pop… hah?…… ha…”


 Her nearly numbed lips were finally released. Aki cracked his eyes open to see Serafall turn her flushed cheek slightly, breathing lightly. Her adorable appearance made the hands caressing her thighs instinctively tighten around her waist.


 ”Ah…”


 Serafall frowned, letting out a tiny, small-animal sound. But she quickly composed herself.


 ”I haven’t said you can open your eyes yet, Aki…”


 Despite sitting on Aki’s lap looking petite and adorable, her figure was incredibly hot. The black-haired girl now radiated an imposing an不可亵渎 (inviolable) aura – like a Demon King commanding a battlefield.


 Her small hand grabbed Aki’s tie, pulling him close without a word, dropping another wet, hot kiss – only this time, the target was his eyes.


 Serafall’s bangs brushed down, a light tickling sensation. Her abnormally hot breaths washed over Aki’s face in waves.


 In his vision, a tiny fragment of bright red tongue gradually grew larger.


 The saliva-suspended little tongue tip just lightly touched Aki’s sclera, then immediately retracted – as if touching burning charcoal.


 Aki was like he’d been hit with some催眠术 (hypnosis spell), staring blankly at the girl on top of him, unable to look away. Even with all his experience, this kind of play was a genuine first.


 Aki’s heart beat faster uncontrollably. He hugged the girl in his arms tight, the thought of possessing her filling his entire mind.


 ”Mmm…”


 Serafall’s face flushed with an abnormal heat. Her fragrant tongue peeked out. Her tranquil purple eyes now seemed soaked in a spring of water.


 She lowered her head slightly, hiding her own eyes. Her slightly nervous breaths unexpectedly harmonized with the light crackling of the fireplace behind her.


 She slowly reached out, tracing down from Aki’s sexy Adam’s apple. Not a complex movement, yet accompanied by unignorable trembling and clumsiness.


 Feeling the numbing pleasure from his body, Aki noticed crimson rapidly spreading across the black-haired girl’s small earlobes.


 From throat to collarbone, then to that chest – not overly exaggerated, but combining strength and beauty.


 If she said she didn’t feel shame at all, that would be a lie. Having your body displayed like a craftwork under someone else’s gaze – even if it’s your lover – still feels…


 Besides, Aki and Serafall weren’t even that. At best, they were acquaintances who liked each other and craved each other’s bodies.


 Aki awkwardly swallowed, about to say something teasing to break the awkwardness, when the silk-stockinged, long-legged, big-breasted girl on his legs suddenly buried her face in his exposed chest. Her hands also seemed to go limp on his shoulders. Her sexy, cute magical girl outfit-clad body trembled slightly.


 By the fireplace’s amber light, Serafall’s ears were completely red.


 Aki could only close his mouth and hold her tight.


 The back of Serafall’s magical girl outfit had a huge opening. Her entire white-jade back was faintly visible beneath her waist-length dense hair.


 Before, Serafall’s outfit had drawn Aki’s eyes like a magnet. Now, the back his palms touched had the perfect, craftwork-like slipperiness of jade – and a trace of heart-wrenching coldness.


 Doing his best to transfer his palm’s warmth to the silent, head-down girl in his arms, Aki watched the fire, silently sorting through today’s events.


 First, she was angry, right?


 Putting himself in her position – forced to offer her body, even if deep down she wasn’t that unwilling, she was still in the wrong. It was still hard to completely not mind.


 Tyrannical and unreasonable, yet the Serafall who endured this Aki was more like an Angel than a Demon King.


 But then again…


 ”Given your personality, Serafall, if you really didn’t want to, would you really submit?”


 His hand slid up her smooth bare back, the silky green strands filtering through his fingers, all the way to the top of her head.


 Asking softly, Aki’s fingers also pinched the roots of those crystal-clear, silky twin-tails on top of her head.


 Like lightly turning reins, a faint, muffled moan drifted from beneath her black hair.


 ”Mmm…”


 Serafall didn’t answer Aki’s question. She just gripped his shoulders tight, her two dexterous silk-stockinged feet silently crossing behind his waist.


 ”As expected…”


 Even though she wanted it too, she kept bringing up Sona Sitri to tease him.


 But this kind of thing only needed a random hint whenever…


 This was probably the difference in thinking between a battle-hardened man and an innocent virgin schoolgirl.


 He was clearly the younger one, yet when dealing with Serafall – or these pure virgin schoolgirls – his mood was less like facing a lover, more like watching a daughter…


 Along with that came deep背德刺激感 (taboo thrill).


 Little Aki (Aki’s member), separated by a layer of fabric, propped up Serafall’s delicate, soft ass flesh. One hand provocatively caressed her smooth lower back, while the other grabbed those silky twin-tails, skillfully tugging them lightly.


 The Serafall in his arms now was like a little bug stuck in a spider web all night – most of her struggle strength gone, yet her body trembling lightly now and then, attracting the greedy predator to enjoy the feast.


 For some girls, hair was an even more forbidden sensitive zone than hands.


 Sometimes even if you held hands, you might not be able to freely play with those dark strands giving off a faint fragrance.


 And Serafall, as a Demon King, almost never let anyone touch her hair out of dignity. Yet now she let Aki play with it.


 And she didn’t seem dissatisfied…


 When Aki, wearing a wicked smile, not only lightly tugged the twin-tails but then buried his face in them – sniffing lightly with his nose, then licking that smooth, snow-white nape – the Serafall in her sexy magical girl outfit just extended her pale arms, tightly wrapping around his neck. She silently bit down on her gums, letting saliva and unconscious hot tears slide down her chin together. Her throat kept letting out tiny animal-like whimpers.


 She had originally planned to start this with a more composed, calm attitude. From the moment she entered, all her actions had gone steadily according to plan. Aki’s performance had been within expectations. Yet at the final threshold, she was too ashamed to continue.


 The one sitting on Aki’s crotch, red-faced, undoing her clothes to touch his body – that was practically a slut…


 From head to ass, a net of tingling electricity enveloped her brain, making Serafall’s whole body go soft, completely unable to exert any strength.


 Her consciousness turned hazy. The only posture that could hide her expression gave Serafall an indescribable sense of security.


 In her daze, she couldn’t help sticking out her tongue, licking his chest like a little cat completely captured by her Master’s skilled hands.


 Satisfied, savoring each other’s bodies with kisses and licks, Aki and Serafall immersed themselves in intimate caresses like wild animals.


 When that white jade nape was almost completely covered in saliva, her licking climbed to Aki’s neck. Naturally, their lips finally met.


 No passionate tongue-tangling. Lips just quietly leaned against each other, sharing temperature and softness.


 Like a child who finally got a longed-for toy, afraid too much excitement would break it and hesitating to unwrap it – carefully probing with the tongue tip, lightly tracing the lip contours. When their tongues touched, both unconsciously chose to gently grind.


 The charcoal danced for a long time. Gradually, Serafall’s back was no longer cold. The fine skin under Aki’s palms began beading with tiny sweat.


 Little Aki (Aki’s member)’s heat burned the girl’s body from below. Her willow waist twisted slightly under her Master’s subconscious desire.


 Even though his brain thought he’d be perfectly happy just holding Serafall, kissing and grinding all night, Little Aki (Aki’s member) had been complaining with swelling pain for a long time.


 Casually checking Serafall’s mood, he pinched her silk-stockinged, soft ass a bit harder. A 魅惑转音 (charming modulated tone) instantly leaked from her lips.


 Then she opened her eyes. Her usually serious red pupils were filled with bewildered moisture, quietly gazing at his eyes with a hint of reproach.


 A lewd inspiration flashed through his mind. He smiled, raising his hand to caress the girl’s wet, hot cheek.


 ”Serafall… I want to do this with you.”


 Holding the slender, warm girl, he walked deeper into the dimness. Aki lay across the leather sofa, placing Serafall on top of him, back to him. Her light body pressed against his chest. Her elastic, perky ass wrapped in black silk stockings faced his face.


 ”Didn’t even wear panties down there… Did you anticipate this day, Serafall?”


 While fondling those soft ass cheeks with affection, Aki teased the big-breasted Demon King schoolgirl who was awkwardly stroking Little Aki (Aki’s member) with her inexperienced technique.


 Perhaps because both their private parts were exposed before each other, and they couldn’t see each other’s expressions, shame quietly retreated to the deepest place.


 Whether Aki or Serafall, both seemed to have unshackled their lewd nature. Their tolerance for dirty talk increased significantly.


 No verbal response came from Serafall. She pretended not to hear. Overcoming her slightly trembling palms, she freed the proud Great Dragon from Aki’s crotch – already making her heart race.


 As for the sixty-nine position, she had only theoretical knowledge from videos and pictures. Actual combat with Aki – today was her first time.


 Same as the videos and pictures: just use her hand while sucking… should… work, right?


 It was just changing positions for oral service. With this self-consolation, Serafall reached out both hands. Her white fingers encircled the deep red Little Aki (Aki’s member), gripping the base. Then she closed her eyes.


 She took a deep breath to calm her heart. The thick, pungent scent that suddenly rushed into her nasal cavity and even her airway felt like her sense of smell had been violently violated. The familiar dizziness paradoxically made her completely relaxed, putting her into a state of estrus, craving the opposite s*x.


 ”Hah……”


 Serafall leaned forward, her expression serious and focused as she breathed onto Little Aki (Aki’s member). Hot air seemed to condense into water on the glans. The wonderful wet heat made Aki’s waist twitch.


 Accompanied by a drawn-out saliva silver chain, Serafall opened her small mouth and took the entire glans in, using the冠状沟 (coronal sulcus) as the boundary – the upper portion was inside her mouth.


 Her soft, hot tongue, like a nimble little snake, coiled and spiraled over the most sensitive surface of Little Aki (Aki’s member). Only when the entire glans was licked wet and shiny did Serafall slowly spit it out, her face flushed as she caught her breath.


 The slightly fishy, bitter Cowper’s fluid slowly dissolved on her tongue. Tasting the flavor of Aki’s excitement, in a place Aki couldn’t see, Serafall’s lips unconsciously curved into a smile.


 ”No need to force yourself, tonight we can take it slow.”


 Aki seemed to misunderstand Serafall’s silence.


 ”Ah… it’s fine… you, just do what you want…”


 The earrings by her temple flashed with silver light. She gathered her scattered hair with her fingers. Her pitch-black glossy head lowered again.


 Wet warmth instantly engulfed Little Aki (Aki’s member), making Aki involuntarily tilt his head back, letting out a sharp inhale.


 After spending some effort adapting to this supreme, marrow-melting pleasure, Aki smiled in satisfaction and began returning the favor to the girl devotedly serving on top of him.


 With the sound of tearing fabric that made one feel completely comfortable, Serafall’s forbidden private area was officially exposed to his gaze.


 Her smooth, pink private parts wordlessly testified to her Master’s serious yet playful personality. Like a delicate flower carefully cultivated for over a decade finally迎来 (welcoming) the moment of being picked – the two petals, like a baby’s lips, trembled nervously.


 ”So cute, Serafall…”


 No matter how many times they’d face each other naked in the future, Aki felt he would keep saying this praise from their first night on – even if she got tired of hearing it.


 Like a suggestion, or a trigger written into Serafall’s instincts, he could clearly feel the body that had been slightly stiff instantly melt into甜媚软糯 (sweetly seductive softness). The tightly closed flower lips slowly seeped transparent wetness.


 He didn’t hesitate to press his mouth against her, licking clean the water trail winding toward her inner thighs. And naturally, inevitably, he arrived at that soft flower mound.


 Whether natural or Serafall intentionally kept it, sparse, fine, short hair grew on that soft mound. The wet, hot tongue easily pressed them flat. Aki used slightly heavier force, determined to transmit this not-too-intense stimulation deeper into the narrow flower path below.


 He patiently licked, his two big hands roaming over Serafall’s ass like unreasoning kings.


 The broken black silk stockings wrapping her plump, perky ass drew out his sadistic urges even more. He couldn’t help kneading and rubbing the girl’s ass flesh, making the Demon King girl with her mouth nearly filled with Little Aki (Aki’s member) let out miserable yet pleasurable muffled moans.


 More and more love juices overflowed. The girl’s clear fragrance was gradually replaced by a richer feminine scent.


 Aki timed it perfectly, using his mouth to catch that trickling spring.


 ”Ah……”


 Serafall’s waist and ass trembled lightly – as if instinctively trying to escape from Aki’s body. But she was immediately pinned down by those two broad palms pressing hard on her ass cheeks, not allowed to escape even a millimeter.


 The thick glans pressed right against her throat. Serafall desperately suppressed her intense gag reflex, running her soft tongue up and down the hard shaft.


 Occasionally slipping into the groove that gave Aki intense pleasure, gently teasing the frenulum inside.


 To give Aki the pleasure of deep-throating, Serafall even buried her entire face deep into Aki’s widely spread crotch.


 Crimson burned her eartips. Light cyan from mild asphyxiation gradually spread across her cheeks. Her body and mind both sank into the light-headed sensation from suffocation.


 Her extremely sensitive, fragile body – more than ever – received hot kisses from Aki’s most private part. The intense sexual pleasure instantly drowned her consciousness. Physiological tears from deep-throating began pouring out like a broken dam.


 The precarious lewd balance instantly shattered. The giant in her throat seemed to run wild. Serafall couldn’t stop the wet, crying moans escaping her.


 She spat out the Little Aki (Aki’s member) in a mess. Her small hand gripped the iron-hard shaft tightly – as if using it as a physical anchor. Her whole body tensed, enduring Aki’s tongue’s细致探索 (meticulous exploration) of her body’s interior.

 —


 Summary:

 In Serafall’s Demon King bedroom, Aki and Serafall’s intimacy escalates. Serafall sheds her shyness, taking the initiative with foot worship and oral service. Aki returns the favor with cunnilingus and analingus. The chapter ends with Serafall overwhelmed by the simultaneous sensations of deep-throating and being eaten out, her precarious composure shattering.


 —


 Trivia:

 1. This is Serafall’s first time – she’s a virgin despite being a Demon King.

 2. Serafall has a sister complex regarding Sona Sitri, which previously held her back.

 3. Serafall’s bedroom is in the Leviathan Palace inherited from the previous Leviathan.

 3. The “magical girl” outfit is Serafall’s signature cosplay – the back is nearly open.

 4. Aki’s Instant Illusion Talent lets him strip and enter combat readiness reflexively.

 5. Serafall’s dual cultivation will eventually boost her to High God / Sub-Dragon God class.

 6. This chapter establishes the “foot worship” dynamic as a recurring element.


Notes:


• Serafall – Serafall Leviathan is a Super-Devil, one of the Four Great Satans, and Sona Sitri’s bubbly, energetic sister with an extreme sister-complex. A peer to Sirzechs who once vied with Grayfia for the title of the Underworld’s strongest female devil, she balances her immense power and threat-monitoring duties as a leader with a personal preference to avoid conflict.

• Aki – A tall, handsome Kuoh Academy student and Red Dragon Emperor, he is a reincarnated cultivator who currently inhabits a pitch-black cat form with piercing azure eyes. Calculating and protective, he commands the Boosted Gear and Origin Blood. Connected to the Gremory household and Naruse Mio via a Soul Network, he manages a vast harem while navigating ancient conspiracies and his own feline instincts.

• Sona Sitri – Sona Sitri, aka Shitori Sona, is a High-Class, pure-blood devil who became a master strategist at seventeen. As Kuoh Academy’s Student Council president, she wears formal attire and glasses, sporting short black hair and a stern look. Noted for her massive Mana, she tactically leads the Sitri family and manages local supernatural threats while deferring to Rias Gremory.

• Sitri – The prestigious devil hierarchy family name carried by Sona, representing her noble lineage and identity.

• Sona – An analytical, bespectacled young woman with long black hair, she is the Sitri clan’s future head and Student Council President. Highly intelligent and composed, she manages her council with structured leadership. As a strategic, noble ally to Rias, she works to protect their shared interests and serves as a capable, potential collaborator.

• Y – The first initial/part of the name Y Ddraig Goch.

• Natural – A young succubus who remains unthreatened in the current timeline.

• Leviathan – A title of the Four Great Satans held by Serafall and Katerea, designating their status as high-ranking Demon King-class entities. Serafall maintains crucial diplomatic ties with other factions as a leader scheduled to attend the summit, while both are defined by their supreme authority and distinct, powerful identities within the underworld’s hierarchy.


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Edited by Kanaa-senpai.
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