nagi's son having a jealousy streak
you were in the middle of slicing fruit for your son’s lunch box when you heard the faint sound of his tiny feet padding across the floor. it was early, the sun barely peeking through the curtains, and nagi was still half-asleep on the couch, one arm hanging off the side like he’d melted there overnight.
you hummed to yourself as you packed the small bento—apple slices shaped like stars, his favorite sandwich, and one of those cute little yogurt drinks. your son peeked in from the hallway, rubbing his eyes, his hair sticking up just like nagi’s when he wakes up. you swore sometimes they were carbon copies, down to the sleepy pout and stubborn bedhead.
you turned when your phone buzzed and picked it up. “hello? yes, this is for a prenatal check-up… uh-huh, around seven weeks along, yes.”
you didn’t notice your son standing by the corner, clutching his plush shark tightly. he frowned, confusion crossing his face. prenatal? seven weeks? check-up? his little brain did the math—well, not really math, more like a gut feeling—and came to one tragic conclusion.
mama was getting another baby.
he blinked, betrayed. his grip on the plush shark tightened. no way. she already has me. and papa. why would she want another one?
he stomped off, face scrunched in indignation, nearly tripping over nagi’s sneakers that were just randomly lying in the middle of the floor. nagi snorted softly in his sleep, muttering, “mmm… five more minutes, babe…” completely oblivious to the emotional crisis happening ten feet away.
by the time you were ready to drop your son off at preschool, he was oddly quiet. no whining about socks. no rambling about dinosaurs. no asking if nagi was gonna pick him up after practice. you crouched down to fix his collar. “hey, baby, where’s my morning kiss?”
he just crossed his little arms and turned away.
you blinked. “don’t wanna what?”
he refused to answer, clutching his plush shark tighter as if it could protect him from you.
you smiled awkwardly at his teacher, who gave you a sympathetic look as she led him inside. your heart sank a bit. maybe he was tired? or maybe he had a fight with his classmate again? you brushed it off, heading to your appointment while mentally noting to talk to him later.
after your appointment, you couldn’t stop smiling. hearing the faint little heartbeat made your eyes sting with happy tears—you were already imagining how to surprise nagi and your son tonight. maybe a little dinner at home, something simple and sweet. you even bought a small white onesie that said player two loading… because, well, nagi would get a kick out of that.
you picked your son up from preschool in the afternoon. he climbed into his seat silently, staring out the window with that same little pout.
“hey, baby,” you said softly. “did something happen at school?”
he kicked his legs lightly, clearly torn between keeping the secret and exploding. finally, his bottom lip trembled. “i don’t want it.”
“don’t want what, sweetheart?”
“the baby!” he blurted out, eyes filling with tears. “i don’t want it! you already have me!”
you froze. “...oh.” so that’s what this was.
his tiny fists balled up in his lap. “you’re gonna love the baby more and forget about me! and papa already steals you all the time—he hugs you too much!”
you had to bite back a laugh at that. so it’s both jealousy and seishiro-related trauma.
you pulled over and turned to face him, gently brushing his hair back. “hey, listen to me, okay? i’m always gonna love you. nothing’s gonna change that. you’ll still get my hugs, my kisses, my bedtime stories—everything. you’ll just have someone new to share them with.”
“but… what if you love them more?” he whispered.
you smiled and leaned forward to kiss his forehead. “not possible. my heart just gets bigger, that’s all.”
he sniffled, finally letting you hug him tight. he mumbled something like “okay” into your shirt, and you couldn’t help but smile into his hair.
when you got home, nagi was sitting on the couch again, half-wrapped in a blanket, scrolling on his phone with that lazy posture that somehow screamed both “professional athlete” and “permanent couch ornament.”
“yo,” he greeted, eyes still on his screen. “you’re back.”
“mhm. and so is someone’s attitude,” you said, glancing at your son.
nagi peered up lazily. “huh? what’d he do this time?”
before you could answer, your son suddenly blurted out, “mama’s having a baby!”
you froze mid-step. nagi blinked slowly, phone lowering. “…huh?”
you looked at your son, who instantly realized what he said and gasped, slapping both hands over his mouth.
nagi’s brows lifted. “wait, for real?” he turned to you, expression brightening. “we’re having another one?”
you sighed, placing a hand on your hip. “so much for the surprise.”
his lips curled into a lazy grin as he pushed himself off the couch. “that’s crazy, babe. guess i gotta train harder now. more mouths to feed.”
you laughed softly. “you already complain about training every day.”
“yeah, but now i’ll complain with purpose,” he mumbled, wrapping his arms around you. “we’re seriously having another one? that’s kinda wild.”
your son, still sulking, muttered, “see? he’s already taking your attention again.”
nagi looked down at him, smirking. “jealous of your old man, huh?”
“you always take mama’s hugs!”
“well, that’s because she loves me the most.” nagi said it so casually that your son’s gasp was audible.
“no, she doesn’t!” he stomped his foot. “she loves me!”
you pressed your fingers to your temples. “you’re both ridiculous.”
“see?” nagi leaned down, whispering conspiratorially to the boy. “she didn’t deny it.”
you rolled your eyes and flicked his forehead. “don’t teach him your nonsense.”
nagi just grinned and hugged you from behind, resting his chin on your shoulder. “so who’s it gonna be? another me or another you?”
“hopefully not another you,” you said, deadpan.
your son, meanwhile, latched onto your leg, pouting. “but mama loves me the most, right?”
you knelt down and cupped his cheeks. “i love both of you equally. and i’ll love the baby just as much.”
nagi made a fake offended sound. “both? what about me? am i chopped liver?”
you gave him a look. “you’re an oversized baby. you’re included.”
he grinned, clearly satisfied. “nice. family ranking secured.”
you snorted, shaking your head as your son wriggled between you two, yelling, “nooo! papa’s stealing again!”
nagi laughed, scooping him up and tossing him gently in the air. “guess i’ll just keep stealing you both then.”
you stood there watching your two boys—your sleepy, overgrown one and your clingy, jealous little one—filling the living room with laughter. your heart felt full.
later that night, after what could only be described as controlled chaos, the house was finally quiet. nagi had just barely survived bath time—which included him accidentally squirting half a bottle of baby shampoo on both himself and your son (“it’s fine, babe, at least we’re clean and smell nice,” he’d said, looking like a sad bubble creature)—and your son was still giggling about it even as you helped him brush his teeth.
“two stories tonight, okay?” you reminded him once he was tucked into his little bed.
“three,” he negotiated, holding up three fingers with the confidence of a seasoned lawyer.
“two,” you said firmly, though the corners of your lips betrayed you.
he sighed dramatically, flopping back against his pillow. “fine. but they have to be good ones.”
you read the very hungry caterpillar and the little prince, his favorite combo. by the time you closed the second book, his eyelids were heavy, his plush shark tucked under his chin. you leaned down, kissed his forehead, and whispered, “goodnight, baby. stay in your room, okay? promise?”
he nodded sleepily, murmuring, “promise.”
you smiled, turning off the lamp and tiptoeing out of the room. peace at last.
you slipped into bed beside nagi, who was sprawled diagonally like he was trying to claim every inch of space available. his hair was messy, his phone screen dimly lighting his face. he was half-awake, scrolling through videos with that lazy focus unique to him.
“you’re still up?” you mumbled, crawling under the blanket.
“couldn’t sleep,” he muttered, yawning halfway through. “reo sent another compilation of cats knocking things over. kinda relatable.”
you rolled your eyes, curling up beside him. “go to sleep, sei.”
“’m trying,” he mumbled, putting his phone face-down. “you’re too comfy though. distracting.”
you gave him a light kick under the blanket. “goodnight.”
for about ten blissful minutes, the room was quiet—until you heard it. a faint creak. then the soft patter of tiny feet.
before you could even lift your head, the blanket rustled and something small wedged itself between you and nagi.
“mama,” your son whispered, voice sleepy and small. “can i sleep here?”
you blinked, staring down at his tiny form as he burrowed between you two with his plush shark in tow. “baby, you promised you’d stay in your room tonight.”
“i changed my mind,” he said simply, already half-asleep again.
you sighed, brushing his hair back. “sei,” you whispered toward nagi’s side of the bed, “did you leave the door unlocked again?”
there was a pause, followed by nagi’s low, drowsy mumble. “mm… maybe.”
“you always ‘maybe,’” you whispered accusingly.
“’cause i knew he’d come anyway,” he said, voice muffled by the pillow. one long arm lazily reached out and wrapped around both you and your son, pulling you close until you were all in a warm, sleepy tangle.
“you’re both warm,” nagi murmured, clearly pleased with himself. “perfect blanket combo.”
“you’re hopeless,” you sighed.
“you love it,” he countered softly.
you were about to respond when your son, voice faint and thick with sleep, mumbled, “mama… we need a bigger bed.”
you froze, biting back a laugh. “a bigger bed?”
“mhm,” he hummed. “so when my baby sibling comes… they can sleep here too. i want them to feel your love too.”
you blinked, heart doing that melty thing that always happened when he said something unexpectedly sweet.
nagi let out a sleepy chuckle behind you, breath warm against your neck. “he’s got a point, though. we’re running outta space.”
“you don’t even stay on your side of the bed,” you whispered.
“that’s ‘cause my side’s wherever you are.”
“corny,” you muttered, even as your lips curved into a smile.
nagi hummed lazily. “you like it.”
you reached down to smooth your son’s hair, and he instinctively grabbed your hand, snuggling closer. nagi’s hand joined yours soon after, his fingers brushing yours as he idly caressed your son’s soft hair. for a moment, it was quiet again, just the hum of the night and the soft rhythm of your breathing.
then your son started mumbling in his sleep.
“i’ll… share my toys…” he whispered, voice slurred with dreams. “and my snacks… but not the gummy bears… maybe one…”
you pressed your lips together, trying not to laugh.
“he’s bargaining in his sleep,” nagi said in amusement, his tone soft.
“just like you when i ask you to share your chips,” you teased.
nagi huffed a small laugh. “see? he’s my mini-me.”
“mm. let’s hope he doesn’t inherit your energy levels too,” you whispered.
“hey,” nagi murmured, feigning offense. “i have energy. i just save it for important things.”
you rolled your eyes, cheeks warming despite yourself. “you’re ridiculous.”
“efficient,” he corrected, his voice getting sleepier. “big difference.”
your son stirred again, mumbling softly, “i’ll protect the baby… from monsters… and papa’s snoring…”
you and nagi both froze before quietly snickering.
“traitor,” nagi whispered.
“he’s not wrong,” you whispered back, grinning.
nagi leaned in close enough that his breath brushed your ear. “you snore too, y’know.”
you gasped quietly. “i do not.”
“yeah, you do,” he murmured. “tiny ones. like… pffft pffft.”
you smacked his chest lightly, trying not to laugh too loud and wake your son. “stop—”
he chuckled lazily, arm tightening around you both. “can’t. too comfy.”
you sighed, giving up as you snuggled closer, your son squished safely between the two of you like the warmest little burrito.
“sei,” you whispered softly. “we really might need a bigger bed soon.”
“mm,” he mumbled. “king size… family upgrade.”
“that’s what you said when we got a cat.”
“yeah, but this time i mean it,” he said, voice fading into drowsy warmth.
you smiled in the dark, fingers tracing little circles on your son’s back. his breathing was even now, peaceful, and every once in a while, he’d mumble something adorable like, “baby can borrow my crayons… but not the blue one…”
you met nagi’s gaze in the dim light, both of you fighting back laughs.
“he’s gonna be the sweetest big brother,” you whispered.
nagi hummed, pressing a soft kiss to your hair. “he’s got your heart. your softness. my looks. unbeatable combo.”
“your arrogance too,” you teased.
“can’t be perfect without flaws,” he murmured, grin audible in his tone.
you rolled your eyes, but your chest felt warm—so full it almost ached. you leaned back into him, your little family tucked safely between the sheets, the room filled with the sound of gentle breaths and occasional sleepy mumbling about gummy bears.
“goodnight, sei,” you whispered.
“’night, mama,” he mumbled automatically.
nagi’s voice followed, low and lazy. “’night, my girl. and my guys.”
“sei,” you whispered again, amused, “you’re not allowed to call the baby ‘my guy’ before we even know.”
“too late,” he said softly, already drifting off. “called dibs.”
and somewhere between his drowsy chuckles and your son’s sleepy murmurs about protecting his “mini baby,” you realized you didn’t actually need a bigger bed—because somehow, even in the tiniest space, there was always enough room for all the love in the world.
© 2025 yukkigiri ☾ creations by luna — please do not repost, copy, or translate without permission.
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