⤷ P1 of BF/GF HEADCANONS , SAKADAYS .
fandom 𓂃 sakamoto days.
P1 𓂃 nagumo, gaku & natsuki.
characters 𓂃 nagumo , gaku , natsuki , kei , shin , sakamoto , apart , gozu , kashima , shishiba , tanabata , heisuke , kaji , shinaya .
content 𓂃 headcanons of them as your partner.
requested 𓂃 by anon.
⤷ NAGUMO YOICHI HCS .
nagumo is not an easy person to truly let in — not just because his entire professional life revolves around deception, manipulation, and the casual ending of human lives, but also because he's spent so long wearing that permanent smile that even he sometimes forgets what's real and what's just another mask. Coming from a famous family of spies, he was practically raised on the principle that trust is a weakness and that the only person you can rely on is yourself. So the fact that he's even considering a serious relationship with you (given that all his past ones failed)? that means you've already done something no one else has managed in years.
nagumo cannot cook to save his life. This is not an exaggeration. The son of a famous spy family, top-tier assassin, master of disguise, genius-level intellect — cannot boil rice without setting off the fire alarm. You will eat takeout every single night or you will learn to cook for two. He will compensate by handling every other household task with terrifying efficiency. The man has never left a dish in the sink overnight. Your bathroom has never been cleaner. You're pretty sure he reorganized your entire spice rack alphabetically and by frequency of use. It's the most passive-aggressive competence you've ever witnessed.
the man gets carsick on everything. Cars, buses, trains, boats, the world's gentlest ferris wheel. He once threw up in a moving taxi, cleaned it up himself in under thirty seconds without the driver noticing, and then continued a conversation about tax reform like nothing had happened. You're the only person who knows he keeps motion sickness medication in his briefcase next to the assassination weapons. The priority ordering is very funny to you. Less funny to him. You always keep a lunch bag on you whenever you’re together in the car (for him), and you never let him drive. Not that he’d want to, anyway.
for someone who values deception as his primary skill, he is shockingly, almost pathetically honest with you about small things. "I ate the last piece of cake." "I hid your keys because I wanted you to stay longer." "I pretended not to hear you call my name because I was enjoying watching you look for me." He cannot help himself. The big lies come easy. The little ones? The domestic ones? They stick in his throat like broken glass.
he texts in morse code when he's in danger. Not because he expects you to understand it — he knows you don't — but because typing it out helps him think clearly. You've learned to recognize the rhythm of his panicked messages versus his casual ones. A staccato burst of dots and dashes means he's fine, just bored on a stakeout. Long, drawn-out patterns with weird spacing mean you should probably check the news in the morning.
adding onto the Morse code thing, he would definitely teach you if ever had an interest in learning.
nagumo is a lightweight. Everyone knows this. What they don't know is that the man becomes aggressively, almost embarrassingly needy after two drinks. Not in a dramatic way — he won't cry or confess his undying love or anything theatrical like that. Instead, he just... stops letting go of you. His hand finds your sleeve. His head drops onto your shoulder. He follows you from room to room like a lost cat, not saying anything, dragging you to bed because he’s cold and wants to cuddle.
when you're sick, Nagumo is great at stillness. He will sit beside you for hours without moving, without checking his phone, without getting bored. He'll read aloud to you if you want. He'll just exist next to you, a steady warm presence, and something about the way he goes so quiet — no jokes, no teasing, no mask.
he refuses to sleep when you're sick. Just outright refuses. You'll wake up at 3 AM to find him sitting in a chair across the room, watching you breathe, and when you ask what he's doing he'll just say "nothing" and look away. He's terrified, you realize. Not of you dying — you just have the flu — but of not being there. Of something happening while his guard is down. Of losing another person he loves because he blinked at the wrong moment. You don't call him out on it. You just shift over and pat the empty space beside you. After a long moment, he takes it.
when he’s sick? nagumo is the worst patient on planet Earth. Worse than a child. He will deny being sick until he's literally collapsing, and even then he'll claim it's "just a little tiredness" or "probably something I ate."
he falls asleep holding your hand when he's sick. Not because he means to — he'd never admit to needing that — but because his feverish brain forgets to be guarded, forgets to maintain distance, forgets all the walls he's spent decades building. You'll extract your hand to get more water and he'll make a small, distressed sound in his sleep. The water can wait.
his favorite form of physical affection is back-hugging you while you're doing something mundane. Cooking. Brushing your teeth. Trying to leave for work. He'll just appear behind you silently and wrap his arms around your waist, hook his chin over your shoulder, and stay there.
he’s obsessed with your hands. Not in a weird way. He'll trace your palm lines with his fingertips, compare finger lengths, marvel at how soft your skin is compared to his calloused assassin hands.
he loves when you play with his hair. It's the only time he fully relaxes, the only time that constant smile drops into something softer, something almost peaceful. He'll lie in your lap and close his eyes and let you run your fingers through those messy black strands for hours if you're willing.
his favorite thing to do with you, physically, is absolutely nothing. Lying in bed at 2 PM on a Sunday, neither of you fully awake, limbs tangled together under too many blankets. He'll trace patterns on your skin. Nonsense shapes. Equations, maybe.
nagumo kisses your forehead before he leaves for anything remotely dangerous. Not your lips. Not your cheek. Your forehead. It's quick, almost perfunctory, like he's ticking a box. But the way his hand cups the back of your head, gentle despite everything those hands are capable of — that's not perfunctory.
⤷ GAKU HCS .
the first thing you need to understand is that gaku shows affection through proximity. Not words—he's terrible with those—but just being there. He'll sit next to you. He'll stand close enough that your shoulders brush. He'll fall asleep on your couch instead of going back to his own place because apparently your apartment is "closer" (it's probably not). He's like a cat that way. He doesn't ask for attention. He just appears in your space and waits to see if you'll acknowledge him.
moving in together—if it gets that far—will be an experience. Gaku owns maybe four outfits, one weapon, and a gaming console. That's it. No sentimental objects. No photo albums. No furniture of his own. He'll show up with a single duffel bag and look genuinely confused when you ask where the rest of his stuff is. "This is it," he'll say, like it's obvious. And then he'll immediately commandeer your TV for his PlayStation and act like he's lived there for years.
he’s genuinely, almost unnervingly calm about everything. House on fire? He'll finish his snack first. You just told him you love him for the first time? He'll blink at you for five seconds, say "cool," and go back to whatever he was doing. But here's the thing—he'll be thinking about it for days afterward. You'll catch him staring at you with this weird, almost confused expression, like he's trying to process a game mechanic he doesn't fully understand. He's not ignoring your feelings. He's just... bad at feelings. Really bad.
when gaku’s drunk which almost never happens because he doesn't see the point, he becomes weirdly talkative. Not emotional, not clingy, just chatty. He'll explain the entire lore of Resident Evil to you in excruciating detail. He'll rank everyone he's ever fought by how fun they were to kill. (Spoiler: Takamura is number one. He will talk about Takamura for hours. You have learned to just nod along.) The alcohol doesn't make him softer. It makes him more him, which is somehow both better and worse.
when he's sad which is rare, because Gaku doesn't really do sad so much as he does empty, he gets very quiet. Not his normal quiet, where he's just chilling. But the kind where he stops playing his games. Where he just sits and stares at nothing. He won't tell you what's wrong because he probably doesn't even know himself. The orphanage did a number on him, and some days it all just surfaces. You've learned to just sit with him on those days. Don't talk and don't try to fix it. Just be there. Eventually he'll lean his head against your shoulder. That's as close to "thank you" as he gets.
gaku has nightmares about Al-Kamar sometimes. he won’t wake up screaming or anything but you’ll feel him go rigid next to you, his breathing changing, his hands clenching into fists. If you touch him, he'll flinch, maybe wake up startled. So it’s become routine that you don't touch him. You just say his name quietly until his eyes open. He won't talk about it. He'll just stare at the ceiling for a while, and then eventually roll over with you against him and go back to sleep. In the morning, he acts like nothing happened. You act like nothing happened.
physical affection is weird with him. Not because he dislikes it — he actually seems to enjoy it quite a bit — but because he has no idea how to initiate it. He'll just sort of... loom near you. Stand close and wait until you realize he wants something. He's like a npc waiting for you to press the interaction button. He likes holding your hand because it's something to do with his hands. He likes when you lean against him because you're warm. He's not romantic about any of it he's just physically comfortable with you in a way he isn't with most people.
one of his favorite things to do is exist in the same room as you while he plays video games. He doesn't need you to watch him play or talk to him or even acknowledge him. He just wants you there and he’ll get genuinely annoyed if you leave the room for too long. "Where'd you go?" he'll ask, like you've been gone for hours instead of five minutes. He's not clingy in an emotional way. He's clingy in a "you're part of my environment now and I notice when you're missing" way. He’s very very used to having you around and feels weird when you’re not.
he shows he cares in the most Gaku way possible—by remembering things you didn't even know he noticed. if you mentioned once, offhand, that you liked a certain brand of energy drink. Now there's always one in his bag when he comes over. You said you were cold. Now he sits closer to you on the couch, radiating body heat like a human furnace. You told him a story about your childhood. Three weeks later he referenced a detail from it. He doesn't make a big deal out of any of this. He probably doesn't even realize he's doing it but Gaku is naturally attentive which makes great for little things when it comes to dating.
he gets jealous, but not in a dramatic way. He just watches. If someone flirts with you, he'll look at them with the same expression he uses before a fight. He won't say anything. He won't do anything. He'll just look. And that's lowkey more terrifying than any threat could ever be. The person will usually leave pretty quickly after that.
he doesn't say "I love you" often. Maybe once every few months. And when he does, it's not romantic or dramatic or even particularly warm. It's more of a statement. "Yeah, I love you," he'll say casually. "Obviously." And then he'll go back to his game. But the thing is he means it. He means it more than all the flowery speeches in the world. Gaku doesn't lie. He doesn't see the point. So if he says he loves you, he loves you. End of story.
Gaku is surprisingly easy to be with. Not because he's a good boyfriend by any conventional standard — he forgets things, he's emotionally unavailable, he'll absolutely prioritize a boss fight over a dinner date — but because he never makes you guess where you stand. He's with you because he wants to be with you. If he didn't want to be, he wouldn't be. There's no manipulation, no games, no hidden meanings.
⤷ NATSUKI SEBA HCS .
let’s be honest about natsuki from the jump. Getting close to him is not easy. the guy spent his formative years getting beaten by a father who wanted weapons instead of sons, shipped off to an orphanage that trained children to kill, and experimented on like he was lab equipment instead of a person. so no, he's not going to open up over coffee on the second date. he's not even going to open up over coffee the twentieth date. but if you're patient. if you stick around while he figures out that you're not another person who's going to use him and discard him. you'll find someone who pays attention in a way most people don't. someone who notices things. someone who builds solutions to problems you haven't even complained about yet.
when you start staying over at his workshop regularly, and you will because that's where he lives basically, you'll notice that he has a system for everything. tools organized by weight and frequency of use. blueprints filed by date and project status. spare parts sorted into bins that are labeled in his messy handwriting. and here's the thing. he will, without asking, start applying that same system to your stuff. not because he's controlling but because he genuinely cannot understand how you function in chaos. "your keys were on the counter," he'll say when you can't find them. "i put them on the hook by the door. that's where keys go." he says this like he's explaining gravity to a child.
the protectiveness with natsuki doesn't look like what you'd expect. he's not throwing himself in front of bullets or picking fights with people who look at you wrong. that's not his style. instead, he protects you by being three steps ahead. he'll notice someone paying too much attention to you at a cafe and quietly reposition himself so he's between you and them. he'll build a small device that masks your location when you're walking home alone at night. he'll install better locks on your door without telling you, and you won't even realize until weeks later when you try to use your old key and it doesn't work anymore. he doesn't want credit for any of this. in fact, he'd rather you didn't notice at all. it's just what you do for someone you're not going to let get hurt. he's lost too many people already. he's not planning on losing you.
touching natsuki is complicated. not because he flinches, he's too somewhat put together for that, but because he goes very still. like an animal deciding whether to run or fight. the first few times you reach for his hand, he'll just let you hold it. he won't hold back. his fingers will stay limp in yours, unresponsive, and you'll feel like you're holding a mannequin's hand instead of your boyfriend's. it's not rejection. he just doesn't know what to do. no one's ever done this for him before. no one's ever touched him without wanting something. information. obedience. results. you learn to start small. a hand on his shoulder that lasts two seconds. your knee pressing against his under the table. your pinky hooking around his while you walk. and slowly, over months, he starts responding. his fingers curl around yours. his shoulder relaxes under your palm. he leans into your touch instead of away from it. he's still not good at initiating. but when he does, a hand on your waist guiding you out of someone's way, his forehead resting against yours for just a second before he pulls back, it’s got weight to it because you know what it cost him to do that.
kissing natsuki is an education in restraint. he'll kiss you on the lips, sure, but it's always brief. like he's timing himself. and if you try to deepen it, try to pull him closer, try to make it more than a quick press of mouths, he'll pull back but not angry. "not now," he might say, or he might say nothing at all, and you've learned not to be pushy. but sometimes, rarely, he'll kiss you like he forgot to hold back. like his brain shut off for a second and his body just acted. those kisses are messy and desperate and over too fast. he always looks surprised afterward, like he didn't know he had that in him. you never comment on it. you think if you did, he'd stop entirely.
he kisses your forehead sometimes, too. usually when he thinks you're asleep. it's feather-light, barely there, and he murmurs something against your skin that you can never quite make out. you've stopped trying to catch the words.
your words matter to him more than you realize. not the big declarations, those make him uncomfortable actually, like you're setting him up for something. the small ones are what get him. "i'm glad you're here." "that was a good idea." "you work too hard, come eat something."
jealousy is weird with natsuki because he doesn't get jealous the way normal people do. he doesn't get angry or possessive or start fights. instead, he gets clinical. he'll ask questions. "who was that?" "how do you know them?" "have they always looked at you like that?" and his tone is so neutral, so flat, that you almost miss the tension underneath. he's not interrogating you. he's just trying to figure out if this person is a threat to what you have.
his favorite thing ever, and he'd never admit this out loud, is when you fall asleep in his workshop while he's working. he'll glance over at you, curled up on the old couch and something in his chest will loosen. he thinks you look beautiful in your sleep, but he’s never really say that out loud either.
© nagumolvr , you do not have permission to translate, steal, repost, or feed my work to ai.














