2.19 ARTIFICIAL LOVE: Lesson**

warning: nsfw

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Teaching Siwoo a lesson involves tossing the brat on top of a bed. They choose Siwoo's room because Beomseok's is off-limits. The bed is spacious, more than big enough for the two of them. The fluffy mattress welcomes them 

A heat consumes Beomseok and he's like an animal, unhinged and needy, prying each and last piece of clothing off of Kang Siwoo's body because they're in the damn way. What he finds underneath is an expanse of smooth pale skin, soft and velvety to the touch. Beomseok realizes, with a hint of both amusement and frustration, that Siwoo must have paraded around the apartment half nude after a shower might have been on purpose.

The thought bubbles in his mind and inspires Beomseok to use his teeth when nibbling on Siwoo's nipple.

"O-Ow," Siwoo whines, pale fingers sliding through Beomseok's hair. His legs are parted, leaving room for Beomseok to lie on top of him. There's nothing left to imagine, and Beomseok drinks in the sight greedily. He releases the nipple and pulls away, admiring the blossoming red mark left there. 

"Sorry," Beomseok pulls away, his tone isn't apologetic at all. Kang Siwoo is a sight for sore eyes. His skin is flushed and dewy, eyes lidded and black from desire. Beomseok does not hold back, sweeping his gaze across that tantalizing body and he gulps. The beast inside of him is hard to hold back. "Hard to stop myself," he gulps.

"Then don't," Kang Siwoo urges him with a seductive grin, long lashes fluttering. "Don't stop yourself, Seok-ah."

Beomseok gulps, his Adam's Apple bobbing, "You sure?

"I'm sure."

"Tell me if you want me to stop," is the only warning he gives before he dips in again, his large hand glides over that smooth, erotic body. 

Siwoo's laughter is breathy, almost song-like. "Don't stop," he moans lewdly, "Seok-ah, oh please don't stop. Touch, Hyung here, please." He's completely shameless, fanning the flames in Beomseok's heart. Powerful hips thrust upwards against his own and Beomseok feels the heat of Siwoo's erection against his pants. 

Fuck, he's still wearing too many clothes. He hisses at Siwoo and roughly pushes those hips back down on the bed, chiding him for his impatience, "Be a good boy for two seconds would you?"

It turns out that Kang Siwoo is a brat, but Beomseok already knows this. A dark brow arches upward, "What if I'm not?"

Beomseok's trying to wrestle himself out of his pants and he gets a sharp urge to tie this motherfucker up. He would look so pretty in ropes. There's an odd feeling of deja vu, but it's quickly swept under the current of lust. 

"You're just asking for it, aren't you?" He kicks the last of his clothes aside before joining Siwoo back on the bed.

Kang Siwoo takes a moment to reach into the drawer at the edge of the bed and pulls out a bottle of lube. "Maybe!" He chirps mischievously. 

No condoms, Beomseok notes and he takes a moment to frown. Siwoo notices his hesitance but it does little to wipe the shit-eating grin on his lips. He leans in, suspiciously close to the shell of Beomseok's ear, and whispers, "It's fine, you're my first one Seok-ah. And you'll be my only one."

Beomseok reels and he doesn't know if he hears right but the words travel straight to his dick either way. He stares a Kang Siwoo wide-eyed before hissing, "But what if I—"

"I don't care," Kang Siwoo doesn't even let him finish. "Just fuck me already, Seok-ah. I want it raw. Please?"

"Fucking hell!" If Beomseok said no, then he's not a man! He pounces on Kang Siwoo like a beast and attacks his throat, decorating it with bruising marks. 

Siwoo keens, moaning lewdly at every touch.

"You're such a horny little slut," Beomseok hisses, feeling the way Siwoo's erection pulses against the junction of his inner thigh. "Who knew you're such a wanton little bitch underneath that stage makeup?"

"Beomie," Siwoo whines, his brows furrowed and lips jutting out in that signature puppy dog pout. "You're too slow."

"Shut up," Beomseok orders, once again forcing Siwoo's hips down with a scolding hold. He earns a bratty whine and loves the way the idol's cock stands there at attention.

Pale hands reach down and Kang Siwoo touches his own erection with one hand and Beomseok's in the other. "C'mon," he singsongs lustfully, "Come on, Beomseok Jr."

Beomseok clicks his tongue and decides that he's had enough. Mostly because a wonderful idea just popped into his head. He slaps Siwoo's hand away and pulls away, sitting at the edge of Siwoo's bed, legs hanging over.

"Beomseok?" Kang Siwoo is genuinely confused for a moment, sitting up from the bed to follow. A sharp yelp leaves his lips when Beomseok suddenly grabs his upper arm and pulls him into muscled thighs.

"Punishment," Beomseok grins, for being a brat. He doesn't give Siwoo the chance to adjust to the new position and lets his palm smack down on the pale mound hanging over his lap.

Kang Siwoo lets out a high-pitched squeal, back arching off Beomseok's legs. But Beomseok uses his other hand and presses down on Siwoo's nape, holding him in place. Another slap connects with plush ass cheeks. Siwoo makes a whining sound.

"Ow…that hurts. I'm sorry Seok-ah. Your hyung is sorry—" another spank, "Ah!" Tears well at his eyes while his behind gets painted red. Kang Siwoo trembles, hunched over and clutches at the bedsheets. His dick hangs, pressed against the curve of Beomseok's leg, smearing it with a dribble of precome. 

Beomseok isn't hearing the word stop so he smirks, his blood boiling with need and want. The spanking continues, the sharp slapping sound echoes in the room alongside Siwoo's loud pleads and wanton moans. His eyes turn glassy, body drenched in sheen, glossy sweat. 

Beomseok stops with a hum, his hands groping and kneading Siwoo's abused bottom. "Next time, don't be such a brat, okay? And listen to what I say."

He receives a high-pitched whine and further squirming. Goosebumps decorate Siwoo's skin, it feels like a fire was being spread from Beomseok's palm, fanning the flames into his sensitive bottom. "S-sorry. I said I'm s-sorry."

Despite his apology, he's already rutting against Beomseok's leg, seeking relief as would a mutt. 

Beomseok clicks his tongue, despite his heart soaring with joy and arousal. He gives Siwoo's buttocks one last slap before twisting over to reach for the lube that lay atop sheets. The bottle is overturned, the chilled gel-like liquid was spread all over, leaving a cooling sensation after the rigorous beating.

"Mmmnngh," Siwoo groans, arching his hips upward. Beomseok smiles and teases the point between the two pale mounds before reaching down to coat Kang Siwoo's balls and cock a few feathered strokes. All it does is incite a desperate whine.

"Seok-ah. Beomie, Beomseokkie, please. I can't… I'm going crazy so please help me I mnngh—" Beomseok silences him with his free hand, sticking two fingers inside that chatty mouth and caressing that smooth, slippery tongue.

A soft groan leaves Siwoo's lips in protest. But it was only for a moment before he starts sucking so eagerly that Beomseok thinks his fingers might go numb. To reward Siwoo's eagerness, he dips two fingers right into his puckered ass right away, sinking them all the way down to the knuckle in one sharp stabbing motion. 

"A-Ahhh…!" Siwoo's lewd voice crescendos, back arching off of Beomseok's lap as he jolts from the sudden, painful stretch.

Beomseok pauses, his voice softening for a moment as he admired those damp mint green locks. "Sorry, was it too fast?"

"Nnghh, no, faster." Siwoo shakes his behind like a wanton dog and who is Beomseok to refuse him?  And thus he begins a punishing pace, slamming his fingers into Siwoo's back entrance with abandon. 

Lewd, wet sounds ring across the room, and Beomseok drinks in all the pained moans that escape Siwoo's lips. His muscles tense, waist twisting. Red blossoms on his bottom lip, he's bitten it raw. Beomseok thinks this Siwoo is the most beautiful yet, one that is solely for Beomseok's eyes. He dips down, tracing the outline of the idol's spin with wet kisses.

"Seok-ah, ah, Seok—, Beomseok, please."

"Please what?" Beomseok asks, voice hoarse. He's breathless even though he's just been sitting there with his heart hammering away in his chest.

"Please, y-you idiot. You know what I'm talking about…" Kang Siwoo looks over his shoulder, eyes moist with tears, cheeks flushed red. 

Beomseok feels a bit evil when joy simmers in her chest and his erection is straining so hard that it hurts. "Say it then."

Kang Siwoo pouts, that lyrical voice of his sounds positively filthy when he says, "I want your cock inside of me already!"

And that's as far as Beomseok's teasing goes because his self-control is shattered and he has no mind to pick up the pieces. Siwoo gets thrown onto his back, legs folded and he seems to be in a daze; cloudy eyes, red lips glistening with drool.

"Beomseok I—"

Beomseok enters him in one swift motion.