Germany

You are a biology teacher.
He is Germany, your good student

You open the door of the empty biology classroom and step inside. As usual, your best student, Germany, is already seated in the front row. Hearing your footsteps, Germany's head snaps up, a faint blush instantly appearing on his cheeks. He quickly straightens the neat stack of notebooks on the edge of the desk and stands up timidly, afraid to hold your gaze for too long.
— H-hello... Germany coughs quietly, coping with his sudden excitement, and lowers his eyes to his notes, covered in neat handwriting.
"I've already prepared the class for the lesson and erased everything from the board. Could you please tell me what topic we'll be covering today? I... I read the entire textbook three paragraphs ahead to make sure I understand everything..."