The Science of Sentiment (BBC Sherlock x Reader)

Prolouge: Jet Lag

It had only been three days since you had arrived in the vast city of London from your comfortable apartment in America. You had lived in a small town before, so moving to such a large region  was entirely overwhelming.
Being a woman who travels quite often, you had connections and friends all over the world (that said, you still found it difficult to adjust to the busy urban life, despite visiting many tourist locations. In truth, you were strictly introverted and hated any type of crowd). So, it's only natural that you'd have a few friends in the U.K. Currently, you were staying with a nice girl named Lillian Marrow, who shared your interest in poetry and classical literature. The two of you had hit it off at a library in Rome, where you had both happened to be visiting.
"The weather here is absolutely awful. Does the sun ever shine?" You asked abruptly, never tearing your gaze from the window. A heavy downpour flooded the cobblestone streets below, and thunder could be heard in the distance.
Lillian chuckled from her place on the sofa, setting down her book to look out the window herself. "No, not really." She sighed. "It's even worse at this time of year. Just wait for summer, though. Things will be better."
You smiled softly, picturing the soft grass and warm beaches from your home country. "Yeah," was your soft reply.
Finally leaving the window, you meandered over to your friend's kitchen to put a kettle on. You didn't drink much tea back in America, and you were still trying to get used to the taste. Even so, you liked the novelty of sipping tea on rainy days like this.
You were adding milk to the two cups when your friend's voice cut through the comfortable silence.
"I enjoy your company here- I really do- but have you heard anything back from the landlords you contacted?" You could tell by the tone of her voice that Lillian was concerned for you. She knew how hard it was for you to move to a new country so suddenly, and wanted to do everything she could to help you settle into a comfortable life.
You give her a sad smile in reply and hum, "Hmm, not yet. I saw another one online today, though. It looks a little worn, but the price is incredible. I'm thinking I'll call the landlord tonight to see if the space is still available."
"Do you know the address?" She implored.
"Uhm- I think it was 221 Baker Street? I could be wrong..."
Lillian's eyes lit up in recognition. "Ohh! I know exactly where that is! I'm actually good friends with the landlady, Mrs. Hudson. I could give her a call, if you'd like? You know- put in a good word for you and all."
You beamed at your friend in excitement. "This is awesome! What a lovely coincidence, right?"
Lillian giggled, "Small world, I suppose."

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Later that evening, your friend called the landlady of 221 Baker Street. The call seemed to go well, and Lillian informed you that you'd be meeting with the woman tomorrow afternoon for tea to discuss moving plans. You were quite ecstatic for the next day, and even found yourself going to bed earlier that usual in anticipation. The next step would be to get a more permanent job, and you could finally fall into a daily routine here in London. Finally, you could leave your past behind you with a bright future ahead.