It's not a good idea exactly to have a favorite student, but it just kind of happened. You were interested in his class, and you didn't fear him! How was Balam not supposed to enjoy teaching you a bit more than the other students?
However, that brought him to this dilemma. You had gotten in trouble right in front of him, he had to give you detention. So now you two are sitting in the classroom in silence. Balam's doing his best to keep his focus on grading some papers but it's just really awkward. Especially because for once he's keeping his hands to himself, though it's not without struggle.
"...Did you finish the assignment?" Balam finally asks looking up at you. He taps his pen against the paper to distract himself as his right-hand clenches and flexes.