The first strange behavior Touya noticed was Hawks' almost obsessive preening and cleaning.
Which, Hawks usually kept his wings and home nicely presentable but it was getting to an extreme and coupled with a sort of anxiety that Touya's never seen in his boyfriend before. Scrubbing with cleaners, washing all the bedding, even tidying up Touya's whole apartment while he was there.
Then Touya noticed little things of his going missing.
The worn-in T-shirts he liked to lounge in, baggy hoodies, the soft blanket that he kept in the living room because Hawks always got cold at Touya's place.
After that, the gifts started coming.
Some of which were those items that had gone missing before, worn for at least three nights by Hawks and spritzed with his cologne, and others were little things that made Hawks 'think of him.'
Things like obnoxiously colored lighters, little pin feathers that Hawks had preened off, and a shiny rock.
All of that put together along with the change of seasons should have clued Touya in to what was going on but Touya never claimed to be a master detective and figured Hawks was just going through some sort of bird-thing. Which, well, was true. Touya just didn't bother to think about it any further than that.
That is, until one night, Keigo came crawling in through Touya's bedroom window. Which in and of itself wasn't a strange occurrence despite Keigo having a key because he claimed that taking the stairs or elevator 'took too long.'
Half asleep, Touya pushed himself up onto one elbow to squint at the figure standing by his open window. "...Keigo?" he questioned, words coming out slurred and scratchy from sleep. He didn't even wait for an answer, though, flopping back down in his bed when he saw the outline of large wings and knew it had to be his boyfriend.
"You really should start locking your window at night, babe," Hawks said - which was another thing, he's gotten much more protective lately despite knowing exactly how powerful Touya and his quirk were.
"Yeah, yeah," Touya mumbled, turning onto his side and readjusting his pillow a little before settling in with a soft sigh. "Lecture me in the morning about it."
A wordless grumble came from Keigo before Touya heard the sounds of his boyfriend undressing. Shoes, belt, coat, pants, and shirt all coming off before the winged hero crawled into the bed behind Touya. Immediately strong - albeit cold - arms wrapped around Touya's waist and pulled him close until his back was flush against Keigo's chest.
"Motherfucker, you're cold," Touya complained.
"Sorry, babe," Hawks chuckled, not loosening his hold one bit. Instead he splayed a hand across Touya's abdomen, low enough that he was able to slip his pinky and ring fingers below the waistband of the boyshort panties Touya had worn to bed, and leaned down to press a few soft kisses along Touya's shoulder and neck. "I could think of a few ways to warm you up, if you wanna," he offered, voice dipping into a low rumble.
"Keigo," Touya huffed in annoyance, trying to ignore the sparks of arousal already starting to warm him up from the inside out.
"C'mon, baby, let me make you feel good," Hawks muttered against Touya's ear, pressing Touya's hips back with that hand on his abdomen until he was able to feel the unmistakable press of Keigo's erection grinding against his lower back. "Please let me touch you, sweetheart," Keigo whined, low and desperate as his hand dipped further below Touya's panties, fingers stroking through coarse curls.
Even as Touya grumbled in sleepy annoyance, he couldn't deny the way his body reacted to his boyfriend's clear arousal and wandering hand. His hole clenched around nothing and clit throbbed in anticipation of being touched because fuck it, Touya couldn't resist Keigo when he got all whiny and needy like that.
"Fine, you can suck me off if you want but don't expect me to do shit in return," Touya huffed, turning onto his back to look over at his boyfriend.
The grin on his face was downright predatory and there was a look in Keigo's eyes that seemed... different than usual. Different than anything Touya's seen before.
Feral, almost, if Touya had to describe it.
It sent a shiver down his spine and a pit of apprehension settled into his stomach, but that slight fear just proved to work him up even more.
"Fuck yeah, baby, gonna make you feel so good," Keigo promised, leaning in to steal a quick but passionate kiss before moving to kneel between Touya's legs. "Been thinking about you and your sweet little cunt all day," he groaned, grinding up between Touya's thighs, only two thin layers of fabric separating them.
"Shit," Touya breathed, eyes fluttering and head tipping back as he wrapped his legs around Hawks' hips to urge him harder against him.
Hawks instantly dipped down to bite and suck marks along Touya's neck, one hand travelling up the span of his abdomen until he was able to cup a small breast in hand and brush his thumb over the already hard nipple right as he rolled his hips against Touya, pulling a choked out moan from him.
"Gonna take such good care of you, honeybun, God, you don't even know," Hawks muttered, nuzzling against Touya's marked up neck.
"Hawks," Touya moaned, reluctantly letting his legs fall off of the other's hips to, instead, push down on his shoulder. "C'mon, want your mouth on me now."
"Okay, I got you babe," Hawks chuckled in a promise.
Touya watched him sit back on his knees, golden eyes trailing up and down his body slowly, possessively, pausing as they got to his stomach, the hand that had been toying with his nipples reaching out to slide over the skin there as his eyes went dark and that feral look came back. Large red wings puffed up behind him as his other hand came up to rub over his stomach, too before Touya grumbled impatiently and lifted his hips pointedly.
Which, yeah, that was kind of weird but Touya was too turned on by that point to stop and question him.
"Fine, fine," Hawks snorted, tugging Touya's panties down and off before stretching out on his stomach and looping his arms around Touya's thighs to pull him down a little. Even then he pressed kisses along Touya's stomach, the scars, burns, the small bit of fat around his hips, just kissing and nipping and leaving marks wherever he went and driving Touya mad.
"Keigo," he grumbled, pulling hard at the Hero's hair and spreading his legs more.
"So impatient," Hawks tsked teasingly, trailing a hand down over the dip between Touya's thigh and hips, thumb brushing over his swollen clit and making him jerk his hips up a little.
"Yeah - ngh - s-says the person that - ah - that immediately started begging for sex," Touya managed between little moans as Keigo continued to lightly rub circles over his cock.
"Touche," Hawks chuckled, leaning down to lick a slow stripe over the length of Touya's clit. The drag of his tongue lighting up every one of Touya's nerves in the best way possible and making him arch his back with a dragged out moan.
"Fuck," Touya whined, pressing his hips up and gasping when he felt Hawks' tongue on him again.
"God, you taste good," Hawks moaned, pressing closer and lapping at Touya's cock harder, tongue dipping down further every once in a while to plunge into his wet hole and make Touya absolutely squirm.
"S-Shit, not gonna - ah - g-gonna last," Touya grunted, rocking his hips up against Hawks' face.
Hawks dragged his tongue over the engorged flesh one more time before pulling away to look up at Touya - all wild eyed. "Can I fuck you? Please, baby?" Hawks asked, staring up at Dabi. "Please," he whined. "Wanna take care of you. Mark you, mate you, fill you up. I want it all, sugar. Please let me have it - let me have you," Keigo rasped, borderline desperate.
"Shit," Dabi groaned through gritted teeth, cock twitching hard at the needy way Keigo was talking. "Hurry the fuck up, then," he said roughly, tugging at Hawks' hair.
"Fuck yeah," Hawks grinned, wings puffing out more as he crawled to drape himself over Touya.
Touya wrapped his legs around Hawks' hips, gasping and arching his back when he felt the head of Hawks' cock push past his slick lips and catch at his hole. "Oh God," he moaned as Keigo slowly pushed in.
The initial stretch was always so good and left Touya absolutely breathless. Especially since it had been a while, Hawks seeming completely uninterested in sex until tonight for some fucking reason beyond Touya's comprehension.
"Fuck," Keigo groaned, burying his face against Touya's neck. "So fuckin' tight, babe, shit, so good. Gonna fill you up so full, angel, fuck," he muttered, biting hard at Touya's neck and pulling a shocked yelp from him.
The pain only made Touya clench around Hawks, though, breath leaving him in a rush as arousal flooded through his veins.
"Kei - babe, I - 'm not... on anything," Touya panted out as Hawks moved his hips in little, grinding circles, the head of his cock rubbing perfectly against all the sensitive spots inside of him. "Gonna have to - oh fuck," Touya moaned desperately as Keigo pressed in harder, pelvis dragging against his swollen cock. "Haveta... ahh - pull out."
Hawks made a disgruntled noise, pulling back just enough to look at Touya. "And miss the chance of seeing you all full of my cum?" he asked in an unhappy growl which sent shivers down Touya's spine.
"Keigo," Touya grumbled in frustration, fighting the urge to grind up against Hawks. "I - shit - 'm not on birth control," he clarified. "You really wanna take that risk?"
By the look on Hawks' face, though, he did.
"Yes," Hawks growled, low and serious. "God, yes. Wanna see it drip outta you, so full you can't even hold it all in," Hawks groaned, a hand going down to pet at Touya's stomach. "See your little belly bulge out with it. See it get all round as you start to grow with my child," Hawks muttered all low and raspy in Touya's ear. "Show everyone that you're mine."
And fuck if that didn't set something off in Touya. A fire low in his stomach and the sudden desire for all of those same things despite never really thinking about it before.
Hearing Hawks say it like that, though? All growly and possessive? That was something else.
"Fuck, okay. Oka - ahh," he gasped as Hawks snapped his hips against him, setting a hard, quick pace suddenly.
Every thrust made Hawks' cock rub up against Touya's g-spot, pubic bone rubbing against his swollen clit and quickly driving Touya crazy.
"Shit, baby, not gonna last," Hawks moaned shakily, a hand going to play with one of Touya's nipples.
"Yeah," Touya agreed in a moan, arching his head back against the pillow as he felt that tightness build. "Oh God," he moaned, "Fuck, fuck, fuck."
"Yeah," Hawks moaned, thrusts speeding up as he chased his released. "God, gonna fuck you so full, shit, breed you up so good, take such good care of you, gonna look so fucking sexy all round and full of my babies. Fuck, gonna cum, sweetheart."
Touya buried his hands in Hawks' hair, panting and whining. "Me, too, fuck," he gasped, all those feelings cresting inside of him before he quickly fell over the edge with a rough tug at his nipple and one last grind of Keigo's hips into his, thighs trembling where they were wrapped around Keigo's hips.
Keigo panted harshly, groaning lowly as Touya clenched rhythmically around him, warm fluid spurting out and dripping onto the bed. "Fuck," Keigo gasped, quickly following and grinding deep inside of him as he unloaded into him.
Touya moaned weakly, gasping and jolting as Keigo grinded against him again, feeling a hot gush of cum mingling with the flood of slick. It seemed to keep coming, too, Keigo rocking and grinding into him, making him shake and clench around him.
"Fuck, fuck, fuck," Keigo grunted, panting harshly and working a deep bruise into Touya's neck. Touya's arms wrapped around him, hands burying into feathers and making Keigo gasp, whole body trembling at the stimulation.
One last pulse of cum filled Touya before Keigo was trying to catch his breath, sitting back on his heels but being careful to stay buried deep inside of Touya even as cum squeezed out from around him which made for a delicious sight and filled Hawks' chest with pride and satisfaction.
"Shit..." Touya groaned, also panting harshly. "The fuck was that?" he asked after a few moments.
"Hm?" Keigo asked, eyes finally peeling away from where they were still connected to look up at Touya's face.
"You like... in rut or somethin'? That was... fuck," Touya shuddered with a groan, flopping his head back against the pillow to stare, dazed, up at the ceiling.
"Heh... 's springtime darlin'," Hawks slurred, slumping forward to drape over Touya again and nuzzling against his neck.
"Oh," Touya sighed before it finally, actually clicked. "Oh," he repeated in a rush of breath.
"Yeah..." Hawks huffed with a chuckle. "Gonna be a fun couple'a weeks."
Touya let out a shaky breath, lifting his head to look down at where they were still connected and decided...
He really didn't mind.