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One of the main things that left Genya with butterflies in his tummy is just how short his boyfriend was compared to him, having to always crouch when Zenitsu wanted to press a kiss against his temples or cheek.
At first it was slightly annoying, but it grew onto him. To see the top of Zenitsu’s head, watching him have to tippy-toe just to kiss him, even on the train; Zenitsu would rather hold Genya’s hand instead of using the support handles above them.
There’s times where he’s admitted to using Genya as a ‘landmark’ when he was lost in a crowd, or the times that he had wondered how it’d be to see the world at his height.
Genya’s never a jerk about it though, no jokes about “how’s the weather down there?” or, “careful there.”
Zenitsu already had enough insecurities, not being as tall as him shouldn’t be added to the collection.
However, Zenitsu seems to enjoy the difference.
The many moments where he’d pull Genya down by the collar to wrap his arms around his neck, the taller boy being able to feel him smile when Zenitsu would leave a kiss behind his ear.
As well as the longing eyes directed towards his arms, the blonde just staring with interest; Genya later found out that Zenitsu wanted to feel how it’d feel to be carried in his arms.
There’s times where Genya didn’t mind his height, too busy being entranced by lightning blonde locks and shy smiles.
Like Zenitsu twirling on his toes at the school’s festival, still in his uniform and joyfully pointing at every booth before snatching Genya’s hand with a gentle blush on his cheeks.
Like the fireworks exploding above them, and although there’s earplugs in his ears— Genya’s sure that the blonde is able to hear his booming heartbeat when those amber eyes flicker towards him and his lips curl so softly.
It doesn’t matter if his back aches slightly upon the multiple times he’s crouching, or how often Zenitsu uses him as a safety pole while on a rickety train, or how his boyfriend has to look up at him to smile joyfully.
There doesn’t seem to be a problem with it, and even if there were— it’s not like Genya can magically shrink or if Zenitsu can magically grow.
There’s soft hands at each of his cheeks, and a pair of slightly chapped lips press upon the skin between his brows. Then they make their way to his nose, below each of his eyes, next is the gentle peck on his cheeks. The kiss upon his scar takes longer, as if he wants to trace the shape of the former injury.
“My back fuckin’ hurts.”
When Genya’s eyes flutter open, his boyfriend’s cheeks are cherry red and his hands fall off his face delicately.
“Sorry.” The blonde apologizes, a finger brushing against his lips as if he hadn’t kissed Genya multiple times before. Well.. leaving kisses all over his face was probably super intimate for him, but still— the blush splattered over his cheeks wasn’t unwelcome. “I just l-like you, a lot..”
Genya hums, rising to his full height.
“We’ve been dating for a year and you still haven’t managed to fucking say ‘I love you’ yet.”
The shorter sputters, before crossing his arms.
“E-every time I try to I’m always stuttering and I can’t say it!”
“You’re always stuttering.”
“Shaddup!” He shrieks, “you’re lucky your head is up there! Or else I would’ve smacked the hell out of you!”
Oh yeah, that’s the last perk. Not being able to experience Zenitsu’s random acts of violence(that according to Tanjirou, was more affectionate than violent).