Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/11391402.
  Rating:
      Explicit
  Archive Warning:
      Rape/Non-Con, Underage
  Category:
      M/M
  Fandom:
      Death_Note_&_Related_Fandoms, Death_Note_(Anime_&_Manga)
  Relationship:
      L/Yagami_Light, L_&_Yagami_Light, Beyond_Birthday/Yagami_Light
  Character:
      Yagami_Light, L, Beyond_Birthday, L_(Death_Note)
  Additional Tags:
      Alpha/Beta/Omega_Dynamics, Omega_Verse, Gaslighting, Twins, Rape/Non-con
      Elements, Dubious_Consent_Due_To_Identity_Issues, Underage_Sex, Face-
      Fucking, Deepthroating, Come_Swallowing, Daddy_Kink, Cock_Warming, Large
      Cock, Dirty_Talk, Praise_Kink, Size_Difference, Size_Kink, Shota!Light,
      Shota, Omega_Light, Alpha_L, Alpha_Beyond_Birthday, Blow_Jobs, Explicit
      Sexual_Content, Explicit_Language, Dubious_Consent, Extremely_Dubious
      Consent, L_should_know_better_than_to_leave_his_precious_Omega_alone_with
      Beyond
  Series:
      Part 3 of Adventures_in_Babysitting
  Stats:
      Published: 2017-07-03 Words: 2260
****** Sweet Little One ******
by MonsterWhoLies
Summary
     “I couldn’t leave my sweet little one,” He responded with a small
     smile he’d seen on L’s face a million times, an imitation of his twin
     brother that he’d perfected years ago. The Alpha swallowed hard as
     the pretty thing before him fidgeted slightly and blushed at the
     small bit of praise. Oh my, this is too easy.
Notes
     Check the tags...if you find something in the fic that's not in them
     that should be included, let me know, I'll add it...otherwise, if you
     don't like it , don't read it, and move on.
     MWL
“I’ll be back in an hour or so, okay?  He’s sleeping and I didn’t want to wake
him, so just let him know I’ll return soon if he gets up,” L muttered absently
as he grabbed his jacket and headed towards the door.  “I have to sign the
papers regarding the claiming with the Yagamis’.”
Beyond yawned in response where he stood near the door in a pair of low-slung
pajama pants, having been woken up by his brother only a few minutes before. 
He nodded and rubbed his eyes as he held open the door for L
“Maybe…uh, feed him if he’s hungry?”  L mumbled as he gestured towards the
upstairs and shrugged.
“Yeah…sure,” B rolled his eyes.  “Don’t worry about it.  How hard can
babysitting one little Omega be?  He’ll probably still be asleep when you get
back.”
L let out a soft grunt of agreement as he stepped out the door.  The other
Alpha was clearly exhausted, dark circles under his eyes as he exited their
shared abode, worn out after seeing Light through his heat over the course of
the last several days. 
He’d only just brought his new mate home last night.  B had heard them come
in.  The scent of sex and Omega slick still clung to both of them, wafting down
the hall in silent temptation. 
Beyond headed to the kitchen to brew some coffee and make breakfast in case
Light did wake up.  He was just finishing putting together a plate to set aside
for later and pouring his second cup of coffee when he was interrupted.
“L?” The soft, lilting voice of the young Omega murmured as he entered the
room, footsteps padding quietly across the floor as he rubbed his eyes with the
backs of his hands sleepily.  Beyond turned slowly, forcing himself not to grin
and give away the most delicious idea that had just popped into his head.
“I didn’t know where you went…”  The brunet mumbled.  “Is it okay that I, um,
came down?”  He asked, biting his lower lip nervously, eyes wide as he peered
at Beyond for permission and approval.
Beyond chuckled internally.  His twin really had fucked the attitude right out
of his new mate.  Light was well on his way to becoming an excellent little
Omega for L.
“I couldn’t leave my sweet little one,” He responded with a small smile he’d
seen on L’s face a million times, an imitation of his brother that he’d
perfected years ago.  The Alpha swallowed hard as the pretty thing before him
fidgeted slightly and blushed at the small bit of praise.  Oh my, this is too
easy. 
“Are you hungry?”  He asked, taking the freshly brewed cup and the plate of
food toward the dining room as Light yawned and stretched his arms above his
head absently so that the oversized t-shirt of L’s that he wore rode up to the
tops of his slim thighs.  He was adorably unconscious of just how fucking sexy
he was like that.  The innocence he projected even after his heat made Beyond’s
mouth go dry, pupils dilating with desire.  Light nodded and followed him to
the other room, blushing brighter as Beyond gestured for Light to sit in his
lap.
“Come here baby,” Light sweet little bottom came to rest on the tops of B’s
thighs as he sat sideways in his lap. “So good for me…” The Alpha whispered
against the shell of Light’s ear, sending a shiver through the Omega.  Beyond's
hand ran up and down the slender legs before him, relishing the softness of the
bare skin.  His fingers slid up under the shirt and was pleased to find that
Light wore nothing beneath.
That’ll make this even easier.  He thought as Light squirmed.  Beyond pinched
his thigh in warning.
“Stay still for me honey.”
“I-I thought…I was going to eat?” Light squeaked out as B lifted his shirt in
the back, his hand sliding down to knead the supple cheeks with a practiced
touch. 
“You will…” The Alpha kissed Light’s throat, already littered with small
hickeys from L during his heat.  His fingers slipped between the taut, little
globes of the young Omega’s ass and was pleased to find that Light was already
slickening from his ministrations.  The brunet let out a choked sound of
surprise that was just too adorable as Beyond circled the wet entrance
teasingly before sliding one long finger inside. 
“But I think your cunt is awfully hungry too, baby,” He explained as he began
to pump the digit languidly, eliciting a soft whine from the Omega.
“L…ngh…”  Beyond smirked internally as Light’s hands gripped his shoulders
hard, body shaking as the scent of his arousal filled the air.  He added a
second finger and relished the whimpering moan that passed from Light’s lips. 
He’s still so tight…even after being fucked silly for a couple of days.  Damn,
gotta love Omegas. He thought as he shoved a third finger in and held onto
Light firmly as he gasped and tried to escape.
“Naughty boy…be good,” Beyond growled out, nipping at the swanlike column of
the young man’s neck in warning.  He was hard as a rock inside his pants and
wanted nothing more than to get inside the warmth squeezing his fingers in a
suffocating grip. 
“Stand,” He ordered the Omega in a voice laced with an Alpha’s timbre.  Light
scrambled to rise, letting Beyond position him facing toward the table.  “Lift
up that shirt sweetheart, show me that cute little ass of yours.”
Beyond was thrilled at the immediate compliance as Light exposed himself,
holding the front of the shirt against his chest as he shivered slightly and
continued to face forward.  He was so goddamn obedient and B was loving it. 
The Alpha grinned unabashedly as he slid his pajama bottoms down and kicked
them off, freeing his rigid length before sitting down once more.
“Spread your cheeks, baby, I want to see your hole.”
“I can’t hold up the shirt and-”
“Hold the shirt in your teeth,” Beyond rolled his eyes and waited as Light did
as he asked, effectively gagging himself.  He then proceeded to reach back to
grasp a firm, bouncy cheek in each hand and spread himself wide for the Alpha.
Beyond licked his lips at the delectable sight of Light’s glistening pink
entrance and moved his own hands to the Omega’s hips to guide him backward
until it kissed the tip of his aching cock.  Light whined as his hole twitched
against the thick head.
“I’m going to give you my cock now, baby,” Beyond muttered, pulling Light
downward and staring at the sight of the fat tip of his cock slipping within,
spreading the Omega’s tight little hole impossibly wide around him.  Light
throbbed around his length as he struggled to accommodate the girth spearing
him open.  B ignored the brunet’s muffled cries of pain, fingers digging into
the slim hips of the young Omega as he slid in deeper, steadily forcing in
every thick inch of his rigid cock. 
“Take it all for Daddy, that’s right,” He whispered darkly as he flexed his
hips upward, yanking Light down hard to take the last of him fully.
“Mmm…” Beyond groaned as Light pulsed around him.  “That’s good baby, milk my
cock with that tight little cunt.” He hooked Light’s legs on the outside of his
own and pulled him back against his chest, cock shifting deliciously inside the
slick heat. 
“That’s perfect, honey,” He praised the Omega, tugging the shirt from Light’s
mouth and rubbing circles on his little belly.  “Keep my cock nice and warm
like a good boy while we eat breakfast.”
Beyond reached out to pick-up a piece of tamagoyaki with his fingers and held
it up to the young man’s mouth.  Light’s brow furrowed in slight annoyance.
“I can feed myself…” He mumbled quietly as he reluctantly opened his mouth to
let B slide it in.  The Alpha was amused at the bit of defiance and decided he
would actually enjoy the sassy attitude…in small doses that is.  He let it
slide for that reason alone this time.
“Hmm, I know you can baby,” He placated the brunet with a nod and reached for
another piece.  Light seemed to accept this and they continued until he’d
cleared the plate.
Beyond could feel his own patience running out as he carefully slid their chair
a little way back from the table and spread his thighs, forcing Light’s to part
wide as well where they were currently hooked on the outside of his own. 
“L?  What are you doing?”  Light gasped out in surprise.  Beyond ignored him
completely as he lifted the Omega’s slim legs, bending them at the knees and
resting his bare feet on the Alpha’s strong thighs. 
“I’m gonna feed your little pussy my cum sweetheart,” He replied as he gripped
Light’s waist and lifted his smaller body up until only the tip of his cock
remained inside before lowering him onto his massive length again.  Light cried
out as Beyond continued, rolling his hips upward as he dragged the Omega down
repeatedly.
“Shit, so tight baby…such a hot, wet little fuckhole for Daddy’s cock…”  He
muttered as he jutted up into the pulsing channel that was gushing slick now,
an obscene squelching sound filling the air to mingle with Light’s moans and
gasps.  The Alpha grasped Light’s trembling thighs behind the knees and pulled
them tightly to the Omega’s chest, effortlessly holding him there as he
continued to relentlessly fuck into his slick hole.  His balls slapped wetly
against Light’s ass as he drove even deeper than before, eliciting a cry from
the boy that simply fueled the Alpha’s lust.
“Yeah, fucking take it,” Beyond growled as he slammed Light down hard a final
time, forcing the Omega to hold him deep as he painted his insides white with
his cum.  Light moaned loudly as the sensation of being filled with B’s hot
seed triggered his own orgasm, come spilling out of his little cock on to his
tummy.  The Alpha groaned as he realized he was still hard as a rock even after
coming.  He started thrusting again, enjoying the whimpers and whines that
Light let out as he slid in and out of his overstimulated body.  The wet
squelching grew louder once more as his come mixed with the Omega’s slick.
“Please, L…it’s too much…” Beyond let out a huff of annoyance and lifted Light
off his cock, turning him around and making him kneel on the floor between his
spread legs.  He ran his fingers through Light’s hair and tugged him toward his
wet cock.
“Open wide, baby,” Beyond sighed with pleasure as he was enveloped in Light’s
mouth, lips stretching obscenely around him as he slid deeper.  The Omega’s
throat convulsed as he pressed against the back of it.  Light’s eyes widened in
panic. 
“Relax, tilt your chin up a bit…that’s right…” Beyond responded, rising to his
feet and improving the angle to allow Light to take more of his cock down his
throat until finally his balls rested against the brunet’s chin.  He slowly
slid out giving Light a chance to catch his breath, before slipping down his
throat once more.  Beyond gradually picked up the pace as he felt Light relax,
eyes glazed over as instinct won out and he let the Alpha fuck his face. 
“Look so good with my cock in your mouth, fucking whore for it, aren’t you?  I
bet you’d like both of your holes filled at the same time, huh?”  Beyond eyed
the cum and slick dripping out of Light’s ass onto the floor as he considered
the possibilities.  “Look at you, so sloppy and wet…a perfect little cumslut.”
Light whimpered and tried to shake his head, but was silenced as Beyond held
him in place and thrust his entire length into his mouth a final time, coming
hard and spilling down the Omega’s throat.
“Oh, fuck yes…”  He moaned, grinding against Light’s face as he gripped him
hard and made him take every drop.  “So good, baby…ngh…”  He muttered as he
slid out of the cavern of Light’s mouth with a happy sigh.  Beyond chuckled as
he heard the front door open and close.  Excellent timing as always, L…
“B?  Why do I smell…” L’s voice trailed off as he came into the dining room and
took in the scene before him.  Light gazed from one man to another, going pale
as he realized what had just happened.  A sudden flash of anger filled the
little Omega’s face and as Beyond shrugged at L with a shit eating grin on his
face, Light sprang at the Alpha and started hitting him with his small fists.
“Y-you…asshole!  Fucking jerk!  How dare you-” Beyond snickered as Light was
dragged off him by L and thrown over his brother’s shoulder.  “Put me down! 
I’m going to kick his ass…I’m going to kill him…I’m going to…”  Light’s screams
faded away into unintelligible cursing as L hauled him upstairs, snarling all
the while and slamming their bedroom door.  Beyond finally rose from the chair,
pulling his pajama pants back on and grabbing the now cold coffee off the
table.  He hummed a happy tune as he made his way to the kitchen to brew a
fresh cup and wondered just how pissed off his brother would truly be once he
calmed down his Omega.
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