Lovelace

When they were strangers :-
"Oh wait, what was your name? Suit case? Ugly face? Nah wait, what was th-- OH YEAH! SHOELACE?!"
He sighed in annoyance, "It's Jace, you brat."

When they knew each other from almost 2 years :-
"Youuu shoelace! Give me that back! Right. Now."
"I don't know about shoelace, but i can surely be your bra lace," he said with a small smirk, holding her favorite bra out of her reach.

A love story about Lovisa Rao, a 17-years old Indian girl, and Jasper Jace Quinn, a 19-years old British boy. Lovisa came from India to her elder sister, Runali Rao, in England to complete her higher secondary education. There she met Jace, a guitarist and a university student, who was also her sister's best friend, Rosalyn's younger brother.
The relationship which started as strangers soon escalated into bickering and constant teasing. The proximity was forced, as Jace was pushed into being Lovisa's tutor. They annoyed each other all the time, but the slow burn was not oblivious.
And when she wore a saree to her prom... Jace forgot how to breathe, or how to look away from her face when she looked absolutely like a Goddess. Captivating the captor - Lovisa did it that day without even knowing.

The tropes ;)

Friends to Lovers
Slow Burn
Forced Proximity
Sister's Best friend's Brother
Tutor x Student
High school x University romance
Indian x British