seto x reader x haizaki: poly relationship headcanons
this relationship would be a mess
honestly, who knows how it would even come about - it would have to be some kinda scenario where zaki and seto and you are childhood friends, because no way in hella would zaki consider sharing an s/o otherwise
the thing is, the two boys have v different personalities —> it’s like they’re speaking different languages —> arguments
for example, haizaki’s very possessive, and does get jealous quite quickly, whereas seto either doesn’t give a shit, or just pretends not to notice
which leads to haizaki getting mad about how the two of you are treating him like the third wheel (he basically throws a little temper tantrum, storming around the house, whilst seto’s still lying on the couch, half asleep, and you’re rushing after him trying to calm him down)
haizaki rarely will hold a grudge against you, but, man, he can be pissy with seto for a while
seto just really doesn’t help himself. something about the way he acts like he couldn’t care less about what haizaki’s ranting about, and how he’ll be fading back to sleep as haizaki curses him, just fuels haizaki’s anger
in short, really not a good relationship
(i do also think haizaki would probably have a good amount of internalised homophobia, which further sours his relationship with seto)
but, anyway, even with all this shit going on, there is still the occasional fluffy moment
you and seto studying together - haizaki just complaining about being ignored in the background (if you stroke his head as you work, he’ll whine a little less), until you have a question about sexed/physical education for him
even if he hates to admit it, haizaki really likes being able to help you with something (his eyes light up, just a little)
also haizaki and seto have a lot in common
both have older brothers that they lowkey respect, both don’t particularly care about basketball -> so, when they’re not in another argument, they do actually have a lot to talk about
also they’re best after basketball practices, when they’re too tired to egg each other on
lots of post-practice naps together
seto’s the best person to sleep beside, as that man just doesn’t move in his sleep, and he’s v v warm
haizaki’s awful, cause he stretches out like a starfish and moves around nonstop (often falling out of bed)
but, as long as you’re beside seto, haizaki won’t wake you up
other things:
haizaki’s big on pda, though just with you. seto isn’t a fan of it, but does like to kiss haizaki’s forehead, just to wind him up (again, internalised homophobia -> in public, haizaki likes to pretend that he only has a girlfriend, and that seto’s just a friend)
kinda-cuddles where you’re doing haizaki’s hair, and seto’s rested his head on haizaki’s lap, maybe telling haizaki stories about what the kiridai team got up to today
(haizaki really likes hearing stories about how they get away with injuring people. he’s still mad that his own team won’t let him do the same.)
anyway, in general, the relationship’s practically just a little family
where you’re the mother (constantly worrying about making sure everyone’s getting along), seto’s the father (who just doesn’t really care about anything at all) and haizaki’s the toddler who demands attention or else he cries all day
(that’s a joke. he doesn’t cry. he just whines.)
(also now i think about it; this relationship is shitty, but, with time and the chance to adapt and understand one another - and with haizaki supported in dealing with his issues - it could lowkey be very cute)











