Birds of a Feather

You open the door, and he catches his balance from losing the stability of resting against the wood. His eyes remain closed as you let him in because if he dares open them and ruin whatever scheme you have going, he thinks hell will break loose. You’ve always had a flair for the dramatics, after all. And he’s not going to risk making the pounding in his head any worse than it already is, so he keeps those eyes carefully shut.

“Good,” you hum, satisfied. “They’re closed.”

“Callin’ me a liar?” He grumbles. “Now what’s this about, hah?”

“Okay,” you giggle, “I got something in the mail. I think you’ll like it,” you coo, leaning in and pressing a kiss to his jaw. He melts fractionally at the touch of your lips. “I think you’ll really like it. Maybe. I hope.”

“If this is a surprise, it doesn’t sound too promising,” he says under his breath. You smack his chest in response, and he practically sulks. “Just sayin’. You don’t sound too confident.”

“Well, you’re a tough crowd,” you huff, “so you never know.”

“Well, you—”

He’s cut off with his hands being taken into yours, being pulled over to your hips. He pauses, feeling bare skin under his palms. Well, some bare skin. There’s fabric there too, but…clearly not a lot. He’s starting to see where this is going, he thinks.

“S’that a new set?” His lips curl into a grin, eyes still obediently closed. “Fuck, princess—of course I’d love this surprise. Why wouldn’t I? Love anything on you.”

“Not exactly the sort of set you’re thinking of,” you hum. “But close.”

“Can I open my eyes now?”

“Say please.”

“Please. Happy, you little fuckin’ tease?”

“Okay, fine,” you pretend to sigh, caving. “You can open them.”

His eyes open, and Katsuki is…well, he’s speechless, that’s for sure. He has no brainpower for words. Only enough to keep his eyes trailing over your body as he takes in the sight—and fuck, is it a sight.

Most of the time, when kids wear costumes inspired by him, he thinks they’re little brats. Kind of cute brats that he’s admittedly a little fond of deep down, but brats all the same. This, on the other hand, is not a child’s costume with cheap fabric, nor is it anything of the sort that snot-nosed brats would wear.

No.

This rendition of his costume consists of the upper half of it being basically reduced to a bra—black fabric covered with lace that sits against your skin, while bright orange straps cross over your breasts in the unmistakable shape of his signature X emblazoned across his torso. The matching shorts (that are, by all means, very short) sit high on your hips, trimmed with orange embroidery and sheer black mesh. Dark green garter straps circle your thighs, mimicking the harnesses on his hero costume before disappearing into lace-topped stockings.

He blinks. Once. Then twice. Then again. And then his breath hitches terribly loud.

“Do you like it?” You hum, wrapping your arms around his neck as you press a line of kisses along his jaw. He shivers under your touch. “Thought maybe we could match.”

“S’not gonna help you much in a fight bein’ dressed like this,” he croaks, voice shakier than he has the pride to admit.

“Well, I don’t know,” you grin cheekily, “maybe I’ll drop the villains dead by being the hottest hero around, even if I can’t be the most explosive.”

“No villains are seein' you like this,” he huffs, giving your hips a squeeze as he adds, “I'll kill 'em first.”

“So you admit my costume would make for a banger debut, huh?”

“Fuck, baby, you’re killin’ me here,” he groans, burying his head into your neck. He presses soft, lingering kisses to the skin as his hands trail from your hips to the small of your back, pulling you forward and flush against his body. “M’not even gonna ask where the fuck you bought this, or how you even found it in the first place. Fuckin' crazy is what you are.”

“Nice little website that got advertised to me. There was a Deku version, too—”

He picks you up, making a low, dissatisfied sound in the back of his throat as his fingers dig into your ass, carrying you to the bed. He drops you onto the mattress, hovering over you as he pins your hands over your head. His eyes are dark, glinting with arousal and desire and challenge all at once.

“Oh yeah? Well, good thing for you, sweetheart, you got the real deal right here to prove you bought the better costume.”

Katsuki is no longer all that tired. He has enough energy to make his day just a little longer.