@jikyuuryoku liked for a starter!
"H-Huh? Ai?"
Makoto looked puzzled as he hesitantly approached the younger man, still not quite sure that he was seeing the image before him properly.
It had been a while since Makoto had seen Ai, what with his busy Tokyo life and studies preventing him from paying Iwatobi a visit lately. So imagine his surprise at seeing the other sitting and waiting on his campus' grounds.
He couldn't tell if his heart was fluttering from confusion, joy, or worry.
"What are you doing here in Tokyo all of a sudden? And here of all places?"
Ai was learned, and intuitive, and perceptive. And he knew well ahead of time that this happened to be Makoto's campus; the moment his professor had asked him if he had time to visit for a related assignment, the answer was an easy one. Beyond the idea of being able to visit Tokyo, there was an unfurnished spark of something in his gut at knowing the possibility of closer proximity.
Nothing between them had been malicious - or even intentional. Life moved on, and so did they, and when communications slowed to a stop, Ai assumed Makoto to be caught under the swell of medical school.
Yet still. All of this, and the idea of crossing paths with one of several hundreds of people seemed like impossible odds.
Then, he hears his name.
"Makoto--?! Tachibana-san?" The language flip doesn't even occur to him; Ai, from where he had been sitting on a campus round bench, starts to rise to his feet, expression evenly split between bewildered and worried and hopeful all at once. "On an assignment," he clarifies immediately, and in its wake his lips finally begin to curve into a sunny - if slightly rueful - smile. "Sorry, I should have called you ahead of time that I'd be in the area, but figured you'd be busy. Given it's the middle of a weekday, and I'm unsure what your class schedule is like-- I wasn't sure if you'd transferred, or... ..." His words are rapid-fire; over-explained, illustrative of his uncertainty.