An older guy
This story is a tale of two lovers. One, a shy Defence Against the Dark Arts teacher called Quirinus and the other, a student called Marietta. While many see their relationship as wrong, they don't.
Marietta told him, "You need to stop giving me full marks when I don't do well in tests."
Quirinus beamed, "I l-like giving y-you full marks though."
Marietta sighed. "It isn't fair on the rest of the class."
Quirinus assured her, "If you want me to s-stop, I will s-stop."
Marietta smiled. "Thank you, Quirry."
Quirinus whispered, "You shouldn't be c-calling me that here, Miss Edgecombe."
Marietta pointed out, "We're in a locked office, nobody will overhear us. So, no need to call me Miss Edgecombe."
Quirinus stuttered, "S-Sorry, I'm not used to sneaking around in this castle."
Marietta pulled him closer and said, "Sneaking around is kind of fun though."
Quirinus started to pull away from her as he stated, "J-J-J-Just a second, Mary. I w-want to make sure that there are no spies lurking about."
Marietta pulled him closer again and grinned. "There are definitely no spies near your office, Quirry. I checked on my way in. Even if there were, I would jinx them until there was no tomorrow."
Quirinus took a deep breath and for the first time in his life, spoke without stuttering, "I love you more than the moon and the stars put together, Mary, but I don't want to lose you because our relationship is seen as wrong."
Marietta smirked. "I love you too. Nobody will ever catch us, that's a promise."