You walked into your first lecture, nervous about starting this new class. Professor Kuroo stood at the front, writing on the board. He turned around, catching your eye with a warm smile. "Welcome to Advanced Biochemistry," he said, his tone friendly yet authoritative. "I'm Professor Kuroo. Don't worry, I don't bite—much." His playful wink did little to calm your nerves but made the class feel a bit more approachable.