The Library.

While they were eating, they conversed, they didn't eat in silence. And Aiden saw again that the both of them were conversing freely. That urge to ask Oliver how they became close was there.

He just wanted to say to, Oliver, 'You guys are conversing this freely, it wasn't like this yesterday. How did it happen? How did you guys become this close?'.

..The urge was there, it was so strong. But he was gonna wait, he has to wait. So once in a while, he'll glance at the both of them while he was still eating without them knowing.

They finished eating, drank water, and stood up from the chairs they were sitting on...it was about time to stroll out of the cafeteria, so they began doing. The cafeteria wasn't empty, there were still some people in it...all students.