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Initially, they met at the disgusting apartments while Sieun was looking to get back on his feet. After a horrifically messy breakup with his now ex-boyfriend Youngbin, Sieun sports a broken wrist and a limp that’ll follow him forever. Finding a new place to stay was difficult, to say the least, with most of his money going towards the underground abortion he had to have after Youngbin knocked him up. Suffice to say, Sieun was fucking struggling.
Seongje was a tenant — the landlord’s favorite, truthfully. Always hanging around the woman and grinning that charming gummy smile while the lady explained everything to Sieun. She seemed nice, very understanding of the situation he disclosed: he left a partner and now is financially unable to provide much for himself.
“Ah,” the boy with glasses hummed, “isn’t the room next to mine available? That’s the nicest one, I think.”
Sieun took this kindness with a grain of salt. Nobody was nice without reason, not to him. He feels like an edgy child when he thinks to trust no one, but it’s truly what his mother instilled.
He did trust, just once, and it got him here.
Seongje was more than willing to carry Sieun’s belongings when he moved in. He kept the pace up with Sieun, never going too fast and running off while the smaller man limped slightly, and managed to keep up pleasant conversations.
It was only a matter of time before Sieun slipped.
—
Only one month passed before Seongje and Sieun were messing around. For Seongje, it was clearly utter devotion — he referred to Sieun as a masterpiece, worshipping each beauty mark and scar on his skin, down to the mangled skin of his leg and scars under his chest.
Sieun was only human, and the medication he takes for his transition makes him act like an animal in heat. Seongje was there, and Seongje was more than willing.
It doesn’t matter to Sieun that the other tenants seem to fear — or, at the very least, are creeped out by — Seongje, because a month has passed and what Sieun first assumed to be a facade still hadn’t slipped.
Seongje is a dentist, too. He makes good money, but says he stays at the grimy apartments because the landlord is like family. He spent a majority of his life here, and he says leaving the building would be leaving who he is.
—
The rage in Seongje’s eyes is quiet when Sieun finally opens up. Although the label of boyfriends hasn’t fully been introduced, it’s now apparent that Sieun has feelings towards Seongje as well, and their encounters are exclusive.
“I met Youngbin in school,” Sieun admits, fidgeting with a loose thread on the blanket that covers their bodies. He wears Seongje’s oversized tee and a pair of boxers, legs uncovered by clothes despite Sieun’s typical insecurities. “Him and a few of his friends… they were weird. I transitioned young enough to be able to go to an all boy’s school, but I guess they could tell something was wrong with me.”
Seongje frowns. “Nothing’s wrong with you, Sieun.”
Sieun sighs. “Youngbin, I thought, was the only one who grew out of it. Said he teased me because he liked me and it confused him.”
A pause. The boy trembles and avoids touching his stomach with each movement.
“He didn’t grow out of it,” he grumbles, “his friends would come over and-”
He stays eerily still, holding back a sob that lumps in his throat.
“Honestly,” he begins, voice gentle and shaky, “I can’t be absolutely sure that Youngbin was the father of the baby.”
—
Seongje is obsessed. Sieun doesn’t mind, truthfully; his boyfriend — boyfriend — is protective and absolutely head over heels in love. Sieun feels almost like a god, something he never expected with his issues in the past. At most, maybe he’d settle for not feeling queasy just from looking at himself on a daily basis.
But, alas, Seongje makes him feel beautiful. The sex is great, he’s attentive, he’s hot, he’s generous, and he doesn’t let Sieun do a bulk of the work.
He cooks, he cleans, he absolutely pampers Sieun — he’s protective when he needs to be (and sometimes when it’s not needed, either — just ask the tenant named Wooyoung who smiled at Sieun and nearly lost his teeth) and he’s only rough when Sieun asks.
When Seongje asks what school Sieun went to, the boy just chalks it up to his obsessive curiosity. Of course, he indulges it.
—
“Sieun,” he coos, toeing off his shoes and shrugging off his jacket. There’s a slight bulge in his pocket, oddly shaped and poking out at weird angles. It’s explained when Seongje opens his mouth again. “I got you a gift, princess.”
The smaller man sits on the couch, curled up with a novel in his left hand and a cup of hot chocolate in his right. It’s been snowing all day, and he insisted earlier that Seongje should cancel his appointments and just stay in with him, but Seongje said with a pout that he can’t do that last minute.
“Ah,” Sieun hums, smiling just barely. His cast is gone, now left in its wake is a weak wrist with a slight pale discoloration. “You did?”
The sky outside is dark yet the snow still falls. It’s calming, almost, for Sieun to think that the snow could trap them in the building for a bit. His trust in Seongje is unwavering, a comforting thing that keeps him grounded even in the worst moments.
“Mhm,” he confirms, joining his lover on the couch. He presses a kiss to Sieun’s cheek, letting his lips linger in a way that typically means he wants to go further. When he pulls back, his pupils are wide and his grin is almost maniacal.
Seongje reaches into his front pocket and gently pulls out a bracelet. It looks like a charm bracelet, although the typical charms are replaced with ones that look like teeth.
Sieun chuckles, admiring it. “My boyfriend is a dentist, how could I forget?”
The smile on Seongje’s face stays twisted. He pinches the first tooth on the bracelet between his fingers, his thumb brushing along the smooth surface.
“This one,” he begins in a low tone, “Doyun.”
Sieun furrows his brows, but Seongje continues — he cradles the next one in his fingers.
“This one is Jiho — you can tell because it’s sharper than the rest, no?”
The next one: “Jiwon,” he explains, “he was harder to find.”
Then: “Myungdae.”
Finally, he grips the last tooth between his pointer and thumb. He watches Sieun’s face morph between curiosity and a morbid enjoyment of what he’s piecing together.
“Youngbin,” he says, “he had pretty teeth, see? Ah… surely you already knew that.”
“Seongje-” he sputters, “what the fuck? How do you-”
“Byuksan High School,” Seongje grins, “all of those boys stayed in the area after graduating. Not hard to track them down.”
Sieun stays silent, eyes boring into Youngbin’s tooth. He begins to notice the soft stains of blood on each one, the way they shine and rot in certain places — they’re real, he knows.
“You-”
Seongje wordlessly wraps the bracelet around Sieun’s wrist and clasps it to fit perfectly.
“It looks beautiful on you,” he mutters, pulling the hand up gently to kiss his palm and along his fingers. “My perfect boy.”
“…you killed them?”
The man never lets up on his worship, even as he begins to speak. “Don’t be mad, jagiya,” he pleads, his voice backed with a slight whine, “I would’ve let you see, but the idea of them looking at you… I would’ve done worse, you know? I wouldn’t stop until the police would pull me off.”
It’s fucking twisted. It’s so twisted and Sieun should be packing up and running off because Seongje killed five people — probably more, with how calm he is about it all. He should feel disgust, he should be throwing up and sobbing, he should be calling the police and reporting this-
But Sieun pulls Seongje into a rough, heated kiss. It’s nothing short of desperate, and the space between Sieun’s thighs grows wet with the mere idea of Seongje hurting those men.
He licks into Seongje’s mouth, their tongues colliding as Sieun climbs into the other man’s lap. He clings desperately, one hand tugging at Seongje’s hair while the other splays against his broad shoulders. He’s careful to keep the bracelet on.
“Tell me more,” he begs breathlessly, “please, hyung?”
Seongje’s grin widens, almost looking like a pup who was offered a treat. He begins to babble, explaining each method he used on each man, how they screamed and shook down to the way their blood spurted from the holes in their mouth.
The whole time, Sieun would grind down on Seongje’s lap. The man gets hard fast when it comes to Sieun, and the throbbing length poking at Sieun’s thigh had him dripping and soaking his boxers.
Clothes come off in a hurry — the bracelet stays, a silent agreement between the couple. Sieun positions himself above Seongje’s cock, sinking down quickly and eagerly as his cunt stretches to accommodate the girth.
Seongje grips Sieun’s wrist, kissing down his arms and sucking on his fingers with loud and animalistic moans; it’s as if Seongje will lose himself if he’s not tasting Sieun in some way.
“How did-” Sieun moans loudly, letting out a cry when Seongje hits his sweet spot. The taller man brings a hand down to toy with Sieun’s t-dick while dragging the fingers out lewdly, allowing them to catch on his bottom lip. “How did Youngbin act?”
The blissed out smile on Seongje’s face grows, and it’s clear that even the idea of the torture he put Youngbin through gets him off in a way that surprises Sieun; he feels him twitch inside.
“Fucking pathetic,” he groans, fucking roughly into Sieun’s pussy. The wet sounds merge with their moans and the noise of their lips occasionally smacking. “Cried like a bitch, tried to threaten me… the way the fight left him so slowly-”
Sieun cums hard.
He tenses around Seongje’s dick, gushing down the length as his mouth opens around a silent moan. He continues to ride him, urging him to cum inside and fill his cunt until he’s dripping.
“It was perfect, princess,” he moans breathlessly, “next time, I’ll let you see. Maybe you could help, even.”
Sieun nods, sniffling and crying into Seongje’s shoulder as he clenches with every bounce.
A second orgasm washes over Sieun when Seongje bites down on his shoulder. It’s messy and wet, liquid splashing Seongje’s thighs and the couch.
“Fuck-”
Sieun gasps, clinging onto Seongje in a way that keeps the bracelet in view. Both men stare at it as Sieun tiredly grinds down with Seongje’s cock still stuffing him and stretching him open.
“I’d like that, hyung,” he whimpers, voice soft and pathetic, “let me help?”
His eyes are wide and glossy, pleading so beautifully — Seongje stops dead in his tracks, surprised but pleased by Sieun’s offer; his hips stutter and he spills into the man’s wrecked cunt with a low groan.
It takes a bit for them to come down from their highs, with Sieun being lifted off of Seongje’s cock — albeit unwillingly — and watching the thick white substance shine in the low light of the nearby lamp. Sieun’s eyes are fixated on the way his release and Seongje’s own cum coats his cock, a soft yet teasing smile appearing on his face as he squirms out of Seongje’s grip and sinks onto his knees.
“Let me clean you up, hyung,” Sieun insists, lapping at the cum with kitten licks.
Seongje is in heaven. His reserved and snarky boyfriend is sucking him off so eagerly that there’s a bulge in his throat as he moans wildly around the thick length stuffing his mouth — it’s fucking beautiful.
He cums again, right on Sieun’s face, and the smaller boy is too blissed out to complain as he typically would.
—
The following few days are spent with Seongje experimenting to see how far Sieun’s arousal goes for his violence.
He learns that, as his boyfriend sucks the blood from his fingers, Sieun doesn’t have a limit.