Chapter 11 Proof of Concept
PROOF OF CONCEPT (WREN)
Study groups sprawl across the long dark-wood tables—essays versus equations, highlighters bleeding neon into photocopies. Theo sits across from me, calm as ever—sage-green, steady. And then Kieran drops into the seat beside me, close enough that his hoodie brushes my arm, and everything tilts.
We’ve been fake dating for barely a day, and he’s already pretending personal space is a myth.
He leans in, that smug, superstar grin firmly in place, voice a low rumble that curls around the edges of my focus.
“As your boyfriend”—his tone is pure mischief—”I’m well within my rights to kiss you right now.”
I keep my eyes on my notes. “We agreed—no kissing,” I mutter under my breath. “Remember? Last night?”
“Sure.” His shoulder bumps mine lightly. “I just wanted to make sure you’re still committed to that terrible rule.”
“I’m trying to pass this class,” I whisper back, and steel blue flickers through my head, brightening with those white-gold sparks that mean trouble when Kieran is around.
He lowers his voice further, breath warm at my ear. “Blink twice if you’re tempted.”
I widen my eyes and hold them there, refusing to blink at all. My pulse misbehaves, hammering where it shouldn’t.
He catches it—of course he does—and his grin fades to something gentler. “Hey. Relax, Rules,” he murmurs, leaning back just enough to give me air. “I remember. No kissing…” A beat. The corner of his mouth curves again. “…for now.”
Across the table, Theo drags a hand over his face, jaw tight. “Can we table the flirting and actually get work done?” His voice comes out sharper than usual. “Some of us have labs.”
I glance at him, pulse jumping. Theo is famously patient—the guy who explains concepts three times without complaint. This edge is new.
Kieran follows my gaze, mouth curving. “Told you,” he murmurs, so low only I can hear.
I snap my mechanical pencil once, pulling us back to earth—and away from whatever just happened. “The assignment says to design a system that applies mechanics and data collection. I was thinking a rehab brace. Stroke patients. Real-world impact.”
Theo nods stiffly. “That’s solid, Sensei.”
“Predictable,” Kieran says, spinning his pen between his fingers.
I turn to him, irritated. “Predictable usually means it works.”
“Your idea is good, Rules, but—” He leans forward, eyes bright.
“What if we build something we can actually finish? A wearable that measures how the body moves—balance, stride, force. It’s rehab before you get hurt.
” He flicks his pen toward Theo. “We demo it on the ice and the mat by finals. Two athletes, two data sets, same system. Cross-validation.”
Theo’s eyebrows lift. “Preventive instead of reactive. That’s brilliant.”
“Exactly.” Kieran’s smile turns triumphant. “We make it cheap, light, portable. Real mechanics, real data, real motion.”
Theo’s already typing. “Different athletes, different mechanics, shared feedback algorithm... Feldman will love this.”
Kieran looks back at me, eyes glinting. “We’ve got everything we need: a rink, a mat, and two very qualified test subjects.”
I shake my head, trying not to smile. “You’re good at making your case.”
The corner of his mouth curves. “I usually don’t have to try this hard to get someone interested.”
I choke on my coffee, heat flashing to my cheeks. He watches me over the rim of his cup, one brow raised, completely pleased with himself.
“The word you’re looking for is visionary,” he continues smoothly. “Come on, Rules. You want to build something that helps people? This will. It’s just helping them before they break.”
I exhale, giving up the fight. “Fine. But when this fails spectacularly, you’re explaining it to Feldman.”
“Deal,” he says. “I’ll charm him too.”
Theo shakes his head, still typing. “Dude, you seriously cannot help yourself.”
Kieran shrugs, that impossible smile flashing. “Not when the data’s this pretty.” His eyes find mine for half a second too long.
Heat slides up my neck before I can stop it. I stare down at my notes like they suddenly contain the secrets of the universe.
Theo clears his throat. “Okay, this is a real plan. I’ll start a parts list and draft the proposal tonight.”
“I’ll build the hardware and set up the tests,” Kieran says.
“I’ll handle the code and graphs,” Theo adds. He looks at me. “Wren, you do the checks?”
“Calibration and validation,” I say. “I’ll make sure it measures what we think it measures, and that it’s not lying to us.”
“Perfect,” Theo says. “We meet Mondays and Wednesdays until finals.”
“Twice a week.” Kieran scribbles it on the corner of my notes. “Nonnegotiable.”
“Agreed.” Theo’s already packing up. “And if your boyfriend could keep his hands off you during work hours, that’d be great.”
Kieran’s smile turns wicked. “No promises.”
Theo mutters something about professionalism and heads for the exit, laptop under his arm, movements sharp with what looks like frustration.
The moment the door closes, Kieran nudges my shoulder with his. “Told ya. He was watching you the whole time.”
My pulse jumps. “You really think it’s working?”
“From a guy’s perspective? Yeah.” He pushes open the library doors, holding them for me. “He’s definitely seeing you differently now.”
I shouldn’t smile, but I do. This is what I wanted—Theo’s attention, finally. After months of existing in his peripheral vision, suddenly I’m someone he notices. Someone who makes him react.
So why does the victory feel hollow?
The cold night air slides between us, smelling faintly of rain. The quad glows under the lamplight. I hitch my backpack higher on my shoulder.
“Hand it over,” he says, eyeing me.
“What?”
“Your backpack. Boyfriend duty.” That lazy grin. “We agreed.”
I roll my eyes. “I was teasing.”
“I can be very literal,” he says, and plucks it off my shoulder—so smooth I almost forget to protest. “Let a man feel useful.”
I shake my head, laughing.
“Middle-school romance at its finest,” he declares, slinging it over one arm.
Despite myself, I laugh again, and he looks at me like he just scored.
Every few steps, someone calls his name.
He waves, easy and practiced, and every time, the glances flick toward me—curious, assessing, hungry for gossip—my chest tightens.
This is what being seen feels like when you’re standing next to Kieran O’Connor: every eye, every whisper, every speculation landing on you like a spotlight you never asked for.
Then his hand brushes mine—once, twice, deliberate.
I glance up, but he’s already curling his fingers around mine, confident and unhurried, and the warmth of his palm sends a shock racing up my arm that settles low in my belly.
“You okay?” he asks lightly.
“I’m fine,” I lie, staring straight ahead.
“Good,” he says. “Because you’re kind of killing it. If I didn’t know better, I’d say Theo’s in trouble.”
“You think so?”
“I know so.” His fingers tighten around mine. “You make a pretty convincing girlfriend, Rules.”
We walk the rest of the way like that—hands linked, attention following us across the quad.
I tell myself it’s all part of the act. That the warmth spreading through my chest is relief that Theo might finally see me as more than the quiet girl who tutors math.
That this doesn’t mean anything beyond the terms of our agreement.
At the steps of my dorm, yellow light spills across the stone. He stops, still holding my hand, thumb brushing slow circles over my knuckles that send heat climbing up my arm.
“You know,” he says, mouth curving, eyes glinting, “this is the part where I kiss you goodnight.”
I stare at him. “Short memory, O’Connor. We agreed—no kissing.”
“I remember.” His grin softens. “I won’t unless you tell me it’s alright. I’m just saying goodnight like a civilized fake boyfriend.” A beat. “But say my name first.”
“What?”
“Say it,” he murmurs, voice low and rough—maybe by the cold. “Feels good when you do.”
My heart stutters. I’m so confused. What is he doing? What does he mean? This is fake. This is acting. This is about Theo noticing me.
“Kieran.”
The sound of his name lands between us. His thumb pauses, his jaw tightening just enough to notice before he schools it away.
“A little physical contact sells the story, Rules,” he says easily, but his grip is firmer now.
“It’s fine,” I whisper, too thin to mean anything. Fine, no contact…or fine, let’s try?
He studies me, head tipped, eyes gone navy. His gaze hooks on my mouth and holds. His free hand lifts—knuckles under my chin; his thumb skims my lower lip. Not a kiss.
Intent.
It lands like a claim.
My heart sprints. I should move. Remind him Theo isn’t watching.
I don’t.
Slowly, he leans in, offering every out, and at the last second his lips land on my cheek, warm and careful.
The world narrows. Two beats—maybe three—long enough for my eyes to close, for my breath to catch, for everything else to fall away.
When he pulls back, cold rushes in. I almost sway toward him, caught between sense and gravity. My backpack is still slung over his arm. He adjusts the strap, then stops, like he’s lost the thread of what he was doing.
“You okay?” he asks, a beat late.
I nod too fast. “Fine. Totally fine.” My voice cracks in the middle, betraying me.
He smiles, that infuriating, tender thing. “Friday, two o’clock. Don’t flake, Rules.”
“I won’t.”
He hands the backpack back to me, our fingers brushing. “Return to owner,” he says lightly.
I back up the steps, pulse tripping over itself, legs shaky. He’s still there, watching me with that half smile, hands sliding into his pockets, every inch of him confidence and ease while I’m barely holding myself together.
“Sleep well, Rules,” he calls after me.
I manage a nod and slip inside before I do something monumentally stupid like touch my cheek where his lips were.
The door clicks shut behind me, and I lean against it, pressing a hand to my chest like that’ll somehow slow my racing heart. My cheek still tingles—a ghost of warmth I can’t shake.
This is about Theo, I tell myself firmly. Steady, safe, predictable Theo who finally looked at me like I exist.
But Kieran’s the one whose touch I can still feel. It’s Kieran’s voice still echoing in my head—steel blue and silver, calm and magnetic and impossibly steady.
My phone buzzes once. Then again. Then it doesn’t stop.
The screen lights up, flooding the dark room—Instagram, X, TikTok. Notifications pile faster than I can breathe.
I tap Instagram first.
The top post is from @BU_Confessions: a photo of Kieran and me crossing the quad, his hand wrapped around mine, both of us looking at each other. The lighting is perfect—golden lamplight, his profile sharp, my expression soft. We look…real.
BU’s golden boy is officially OFF THE MARKET
Who is she??? #OConnor #NewGirl #CoupleGoals
Three thousand likes. In an hour.
More posts wait below.
One at the library entrance, him holding the door, leaning close to say something that made me smile. Another outside the engineering building, his hoodie brushing my shoulder. And one of me on the dorm steps, him watching me with that expression that makes my stomach flip all over again.
The comments blur together.
Who is this girl and where did she come from?
Wait, I thought he was with that blonde from Pike?
She’s cute but like…normal cute?
I have calc with her. She’s literally a genius.
Oh, so that’s why he’s dating her.
They actually look kinda good together.
Give it two weeks before he’s back to his rotation.
My stomach knots. I knew this could happen; Kieran warned me the campus watched him. But knowing is not the same as seeing it. My face on strangers’ screens. My name in their mouths.
The phone buzzes again.
AUbrEY
BABE. You’re VIRAL. Like actually viral. My entire sorority is losing their minds. Are you okay???
Before I can answer, another message slides in.
UNKNOWN
Cute photos. Hope you’re ready for what comes next
You’re playing in a league you don’t understand
My blood runs cold.
I stare at the message, heart hammering, cheek still tingling where Kieran’s lips touched.
“This is about Theo,” I whisper again, but the words sound like a lie.
Because as I scroll through photo after photo of Kieran and me looking at each other like we mean it, I know I’ve stepped into something far more dangerous than a fake relationship—
something that might not stay fake for long, something already spinning out of my control.