At 1:34 AM, Noah closed his textbook.
Not finished — he used a finger to mark his page, which meant a break. He leaned back in his chair and stretched, the old grey sweater pulling across his shoulders, and exhaled in the way that meant he had hit his limit for passive absorption and needed his brain to do something different.
"Twelve-B," he said.
This was their system. A question number from the practice exam, fired without warning. You had to answer from memory, no notes.
"Wallenberg syndrome," Lena said without looking up. "Lateral medullary infarction. Ipsilateral facial numbness, contralateral body numbness, dysphagia, hoarseness, Horner's—"
"Okay, okay." He held up a hand. "Show-off."
"You asked."
"I regret it." He picked up his coffee cup, found it empty, looked into it with the expression of a man confronting a small tragedy. "I'm going to the machine. You want anything?"
"Whatever's left that isn't the apple thing."
"The apple thing is fine."
"The apple thing," Lena said, "tastes like a decision someone made with no consequences."
He smiled — the quiet one, the real one — and stood up. She watched him go, then looked back at her book, then looked at the space where he had been sitting.
His notes were spread across his side of the table. She could read his handwriting from here — she had spent enough time across from it. Blue underlines, the occasional red star. Her name in the margin of one page, from two weeks ago when she had explained something and he had written it in her exact words because, he said, her explanation was clearer than the textbook's.
Lena's version, it said. Just that.
She looked at it for a long moment.
He came back with two hot chocolates from the machine, which were not coffee but were the only thing available at this hour that wasn't the apple thing. He set one in front of her and sat down.
"We're going to be fine tomorrow," he said. Not reassuringly — just as a statement of fact, the way he said most things.
"I know," she said. "I'm not worried about tomorrow."
"What are you worried about?"
She looked at him. He was looking back, open and unhurried, waiting. This was the thing about Noah — he asked questions and then actually waited for the answer. He did not fill the silence. He let it be there until you were ready to put something in it.
"Nothing," she said. "Not worried. Just thinking."
"About?"
"Neuroanatomy," she said.
He held her gaze for one second longer than necessary, and then he nodded slowly and looked back at his notes. He did not believe her. She could tell by the almost-smile at the corner of his mouth. He did not push.
She wrapped her hands around the warm cup and studied the vagus nerve for the third time that evening.