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Sirius gives Remus a valentine, and Remus doesn't realize it's for him, leading to a lot of misunderstandings and even more parenthetical speech.
Hogwarts-Era. Sirius is a fanboy.
Based on the prompt: Remus is the wizarding equivalent of a teen rockstar who, upon entering Hogwarts to try "normal life," encounters one of his biggest fans, Sirius.
Remus is being dragged into the modern century by his son in the form of a brand-new smartphone. He means to text Teddy, and ends up accidentally meeting, and sharing his plight with another person in the same boat as him. Though Remus thinks it's just a passing moment, little does he know what wheels have been set in motion.
After Remus pokes fun at Sirius for his lack of subtlety, a bet is made. Can Remus get a date without resorting to obvious methods?
Someone is determined to see Remus Lupin, Head of the Dark Creature Legislation and Control Department, dead. Auror Sirius Black is assigned to protect him and in the process, both men find something they never expected.