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Every few weeks, Heizou has a day that routinely goes like this:
Skip morning meetings (as usual), investigate things that interest him (as usual), go out for dinner then try to hang onto some semblance of his usual wit as Kazuha plows into him from behind.
They take turns paying for dinner. Kazuha used to always insist on treating Heizou, but Heizou had pouted enough times that he wanted Kazuha to be spoiled too that Kazuha had relented. They don’t have a “place” per se. They’ve been to Kiminami quite a few times, but they’re both adventurous enough to go check out the newest dishes wherever they are offered.
After dinner and a wonderful conversation on what they’ve been up to, they’ll walk back to Heizou’s place. Not close enough to touch, but close enough to almost feel the heat coming off the other’s skin.
Kazuha likes to wait for Heizou to finish taking off his sandals before wrapping his arms around him from behind and pressing heated kisses to Heizou’s neck. By the time Heizou would have craned his neck back for a hard kiss, Kazuha’s hands would have already unwound Heizou’s haori and thrown it onto the floor, untucked his shirt and started squeezing and pinching his chest.
It’s usually at this point that Heizou has to start leading them into the bedroom, if he wants to land on a soft surface. Kazuha has bent him over the chabudai in the main room before and even once pressed him up against the wall next to the front door and rutted against him until they both came.
In bed, at least, Heizou will sometimes have a pillow to hang onto if Kazuha is content to leave bruised handprints on Heizou’s hips as he relentlessly pulls him back onto his cock. Other times, Kazuha isn’t so merciful. He often likes to wrap a hand around both of Heizou’s wrists and force his arms above his head as the other hand grips his thigh, forcing Heizou to look at him while he grinds his cock at that spot inside him that makes him cry out uncontrollably. The least merciful position is when Kazuha is sitting up against the pillows and has Heizou in his lap, dropping him down onto his cock but not content to let gravity do all the work as he also thrusts upwards over and over and over again and again.
Heizou thinks something about coming back to Inazuma must stress Kazuha out a lot, because the sex is desperate, forceful, and rough.
He, of course, is not complaining, because Heizou is desperate for any scrap of Kazuha’s time and will happily take whatever he is given. Even the bruises are happy little souvenirs for Heizou, something he will press on and smile at on the days that Kazuha is gone again.
Heizou wonders if any of Kazuha’s other lovers also get this treatment when he comes back to them. Maybe Kazuha always fucks like he hasn’t fucked in weeks.
That’s how Heizou would describe it at least, because Heizou doesn’t know what fucking anyone else is like.
What he does know from eavesdropping around the station is that a lot of the married doushin and those that have sex regularly often find that sex with the same person gets boring after a while. Heizou doesn’t have that problem. Sex with Kazuha is always great. Maybe he just doesn’t have enough sex to know, but he feels like Kazuha keeps it interesting enough. The first day back is always rough and desperate. Over the course of the week or two, Kazuha gets gentler but in no way less intense. By the time Kazuha is about to leave again, the sex is downright sensuous. Slow, with intent. Kazuha watches him carefully like he’s memorizing every sound, every involuntary shudder, every breathy call of his name.
Heizou swallows and looks up at Kazuha through his lashes. Kazuha’s eyes are bright and he uses both hands to rub Heizou’s ears and run his thumbs over Heizou’s moles. Then he grips Heizou’s hair and pulls out halfway before ramming his cock back down Heizou’s throat. Heizou moans and lets himself be used. His mouth was trained for this. Kazuha’s cock broke ground here and its shape will forever be imprinted within its walls. Heizou refuses to authorize it for use with anyone else’s parts so his mouth has only ever learned to please just the one person. He always maintains hope, though, that that is enough.
Kazuha gives him a warning noise and Heizou is pulled forward one last time and held there, Kazuha’s curls pressed roughly against his nose as Kazuha comes messily down this throat. Heizou squeezes his eyes shut and hastily swallows as much as he can, desperate to not let a single drop escape. He succeeds at first but a small cough disrupts him and cum leaks out the sides of his mouth. Heizou forces himself to breathe through his nose, his fingers scrabbling uselessly against Kazuha's hard and defined abdominal muscles.
After a shaky breath, Kazuha lets him go and Heizou sits back on his haunches, gasping for air. His fingers desperately push the cum that’s escaped into his heaving mouth and his lungs tighten again as he messily alternates between swallowing and breathing. He moves forward one last time to use his tongue to lap up anything that’s left on Kazuha’s cock. Kazuha twitches with overstimulation but says nothing and smoothes Heizou’s hair back away from his face.
“Heizou, you’re so good at this.”
Heizou preens but something rebellious in him asks “The best?”
“The best,” Kazuha agrees instantly.
Heizou smiles whimsically as he tries to stand on wobbly legs. He is steadied when Kazuha pulls him into his arms and they both inhale each other’s scent deeply. Heizou’s lower half is still exposed and Kazuha's saliva on his dick is cooling as his heartbeat slows. Still, he feels safe in Kazuha’s arms and very content and he thinks he can fall asleep, standing right here.
“Heizou,” Kazuha calls, softly laughing. “Heizou, don’t fall asleep.”
“Mm,” Heizou agrees sleepily.
Kazuha laughs again and Heizou feels himself being carried and deposited gently onto the bed.
“What am I going to do with you?” Kazuha asks.
“Marry me.” He giggles.
And just like that, Heizou’s sleepiness evaporates in an instant. His eyes shoot open and he sits upright. Kazuha reels back in surprise.
“Man alive!! Stay! I mean, no! Don’t stay! I mean-“ Heizou fumbles for words. “I mean. Whatever you want. Do whatever you want. I’ll take it.” He looks at Kazuha beseechingly. “I’ll take it. I’m not picky.”
Kazuha’s jaw drops open. He opens and closes his mouth uselessly a few times. Then he swallows and slowly says, “Heizou...do.... Do you... not know I love you?”
Heizou blushes, his tongue rubbing over his upper lip nervously. “Yes...?” Kazuha always tells him as much - when they’re fucking, when they’re eating, when Kazuha presses a kiss to Heizou’s forehead as soon as he comes back from work and leads him over to the table with dinner all prepared.
“Then...why would you think I wouldn’t want to marry you?”
“I don’t know.” Heizou feels so defeated. “You wouldn’t want to be tied down, right? It’ll interfere with your travels. What would your other lovers think?”
Kazuha sputters. “What other lovers?”
Heizou looks at him, confused. “You know, your other lovers.” He waves his hand around in a circle. “Around.” Around where, he’s not sure.
Kazuha stares at Heizou in horror. Then, his face hardens and he grabs both of Heizou’s hands in his and forces him to make eye contact. “Shikanoin Heizou, listen very carefully. There are no other lovers. You are and have always been my only love. There has never been anyone else. Please never accuse me of loving anyone else ever again.”
Heizou stares at him in shock.
Kazuha takes a deep breath and continues. “I would love to marry you. I thought you wouldn’t have wanted to marry me because I used to be and in some ways still remain a criminal.”
“No! No, of course not!” Heizou feels himself begin to tear up. “I-I love you so much. I can’t get enough of you. I-“ Heizou finally lets out a sob. “I was just so happy with whatever you were willing to give.”
Kazuha pulls him into a hug. “I’m willing to give you everything.”