Noah Bennett had always liked the chemistry building in the same way people liked old churches: not because it was welcoming, but because it was full of quiet rules and the comforting promise that if you followed them, nothing would explode. No damnation, no runaway chain reaction.

  That morning, the building was loud.

  That morning, the building felt loud—more pressure than sound. First-day pressure. New binders, new shoes, the smell of fresh notebooks and nerves pretending to be deodorant. Students moved in clusters like schooling fish. Someone was already lost, which was either impressive or inevitable.

  Noah stood outside Lab 211C with Josh Sullivan and tried to ignore his stomach, which had decided to audition for a washing machine.

  First-day nerves, he told himself. Definitely that. Absolutely not the fact that he’d kissed his neighbour last night, which—by Noah’s standards—counted as an Event.

  He wasn’t a dramatic person. Most of his emotional range lived behind glass with a sign that said DO NOT TOUCH.

  Josh tipped his head, studying him like Noah had started speaking Latin.

  “You look too calm,” Josh said.

  Noah blinked. “That’s not a real problem.”

  “It is when it’s you.” Josh’s eyes narrowed. “Something’s off, Bennett. Either you’re withholding information or you’ve finally learned to implode silently.”

  “I’m a calm man,” Noah said, because if he said it confidently enough, his nervous system might take notes.

  Josh made a skeptical noise. “You’re a responsible man who does a very convincing impression of calm. There’s a difference.”

  Noah stared at the lab door. “I’m conserving resources.”

  “You’re hoarding emotions,” Josh said, pleased with himself. “Like you hoard printer ink.”

  Noah’s mouth twitched once, and he refused to explain that the ink was expensive.

  The lab door opened and the crowd began to funnel inside. Noah followed because that was what calm men did. Calm men did not hesitate in hallways and consider fleeing the city.

  The room smelled like disinfectant and sterile reassurance. Benches sat in neat lines. Equipment waited exactly where it should. The stools looked innocent in the way only spine-hating furniture could.

  Noah and Josh claimed seats. Noah set his notebook down and wrote the date at the top because rituals were cheaper than panic.

  Josh watched him for a beat, then leaned in. “Be honest.”

  Noah didn’t look up. “No, thanks.”

  Josh ignored that. His gaze landed on the neat stack of papers in front of Noah like it had personally insulted him. “Did you read the whole intro packet?”

  “I skimmed,” Noah said.

  Josh stared.

  Noah added, evenly, “There’s a safety and conduct quiz at the end of class.”

  Josh’s eyes fluttered shut. “There’s a life outside of class, Bennett.”

  “There’s also failing,” Noah said mildly.

  Josh gestured at the papers. “Let me guess. Syllabus. Lab manual. Safety guide. And a pledge that says ‘I promise not to lick the beakers.’”

  “It’s not a pledge,” Noah corrected. “It’s a waiver.”

  Josh sat back slowly, diagnosis forming. “That’s the part you want to emphasize.”

  “It’s the part you’re wrong about.”

  Josh pointed at the stack with the grave seriousness of a prosecutor. “And you printed it.”

  “So I can annotate.”

  Josh stared at him like Noah had confessed to collecting toenails. “You’re insane.”

  Noah finally looked over. “You’re just unprepared.”

  Josh pointed at him. “Teacher’s pet.”

  Noah exhaled through his nose. “I’m not a teacher’s pet.”

  Josh’s grin sharpened. “You softball questions to make teachers feel heard. You do it every time. You say something like, ‘So, just to clarify—’ when you’re not clarifying anything for yourself. You’re offering emotional support.”

  Noah stared at him. “That is not what I do.”

  Josh shrugged. “You’re right. You’re not doing it. Yet.”

  Noah opened his mouth to deny it again—

  —and then the front door opened, and the room reoriented itself around whoever had just walked in.

  Josh turned forward automatically, still smug. “Go on, Bennett. Your time to shine.”

  Noah hadn’t heard him.

  Because Rachel Ellis walked in.

  For a moment Noah’s brain refused to process it as Rachel Ellis, because Rachel Ellis belonged to his hallway. To late-summer evenings and accidental run-ins and the slow, strange discovery that he enjoyed being around someone enough to seek them out and miss them after two days without contact.

  Rachel Ellis did not belong behind the front bench of a chemistry lab. This Rachel was different. Hair pinned up, copper kept in check. Glasses in place. A blazer over something simple, professional. A lanyard and keys. A clipboard held in both hands like it was either a shield or a weapon, depending on the day.

  She crossed to the front bench, set her things down, and looked up at the room. Her gaze swept the seats.

  Found Noah.

  Held.

  Noah’s brain stalled out.

  It tried to slot her into the correct category by force: neighbour. Rae. Girl who had looked at him last night like kissing him was the most reasonable thing in the world and then acted on the belief accordingly.

  It tried to reconcile that with the scene in front of him, with the lab benches, the safety posters, and the quiet expectation of authority.

  Rachel’s expression flickered—confusion, then recognition, then a quick, unmistakable shock before she locked it down.

  Noah felt his own face go cold. He did a quick internal inventory of facts, the way he did when something went wrong:

  Rachel was not a grad student.

  Rachel was not just a TA.

  Rachel was standing at the front of his lab.

  And his brain was still stuck on how she’d looked in the soft light of his living room.

  The next thought arrived with horrible clarity, clean and simple:

  Oh.

  Then, a beat later, with the full weight of it:

  Oh, no.

  Beside him, Josh leaned closer, whispering, “Okay, you gotta teach me the ways of a teacher’s pet.”

  Noah didn’t answer. He couldn’t. He was watching Rachel do something he’d seen her do in smaller moments, whenever she needed to put herself back together. Only, he couldn’t help her do so as no small part of him wanted to.

  Her mouth parted slightly as if she might say “Noah”—not loudly, not as an instructor, just automatically—and then she caught herself. Her lips pressed into a line. Her shoulders squared. Her gaze slid away from him with the smooth efficiency of someone closing a door.

  Professional.

  Cold, if you didn’t know her.

  Noah did know her.

  And he watched her do it anyway.

  Rachel looked down at her clipboard. Looked back up. She smiled at the class with her mouth and not much else. “Good morning,” she said, voice steady. “I’m Rachel Ellis. I am the Lead Instructor for this laboratory section.”

  Noah’s traitorous brain supplied Rae like it was trying to get him killed.

  Rachel continued briskly. “Professor Clarke covers the theory in the lecture hall; in this room, you are dealing with practical application. That means you are dealing with me.”

  The next hour happened to Noah in a strange blur of forced attention. He took notes because he always took notes, and because writing was the only way to keep his hands steady. Rachel explained lab partnerships, attendance policies, safety protocols. She drew attention to the eyewash stations with calm practicality. If anyone in the room had asked, she would have looked completely in control.

  Noah watched the slight tremor in her fingers when she turned a page of her notes, and briefly wondered whether it was nerves or him that caused them. He watched her avoid looking directly at him for longer than necessary. He watched her do competence like a camouflage. Or maybe that was just what he wanted it to be. Anything was better than a retroactive deletion.

  At one point she did glance his way—quick, involuntary, like checking whether he was still there. Noah met her eyes without thinking, because his self-preservation instincts had apparently stepped out for coffee. Rachel’s gaze snapped away immediately, and her jaw tightened.

  Horror, Noah realized distantly, was not always accompanied by a dramatic reaction. It could be practical. It could be your brain running numbers and finding none of them acceptable.

  Class ended in a flurry of chairs scraping and students packing up. Rachel dismissed them with the same steady voice she’d used all hour.

  “Be sure you’ve completed the pre-lab reading before next week,” she said. “And please remember: goggles are not optional.”

  Students filed out. Josh lingered just long enough to whisper, “Probably shouldn’t stare too much, Bennett,” in a tone that began as teasing and ended, after Noah didn’t respond, as something closer to concern.

  Noah waited until Josh was pushed along by the crowd, then slowly stood, because his legs had apparently forgotten how to be human.

  Rachel was at the front bench, stacking papers with careful precision. She did not look up, and Noah did not move toward her. He didn’t know what to do with himself in a room that had suddenly become hostile territory. He hadn’t prepared for this variable. He hadn’t even known it existed.

  The lab was nearly empty when his phone buzzed.

  A text.

  Noah stared at the screen.

  Rae: Meet me. 2nd floor, Chemistry Building — East Wing. Hallway past Room 317. Seminar room at the end (319). 10 minutes.

  The name at the top of the screen was still Rae. It felt like the universe hadn’t updated the file. It insisted that the woman who had kissed him like she meant it was the same person currently assigning him coordinates with the neat certainty of someone trying not to fall apart.

  Noah slid his phone back into his pocket and stepped into the hallway.

  The chemistry building stretched ahead in its usual maze of identical corridors, as if it had been designed by someone who believed humans should earn the right to find a seminar room.

  Noah headed for the east wing anyway, because there was no version of this that got better by ignoring it.

  He’d never liked chemistry for the explosions.

  He liked it because, with enough care, you could control the reaction.