It's Just Sex
Louis and Melissa are neighbours who hate each other. They have hated each other for 10 years now but they are forced to spend time with each other for 2 reasons. Their parents are best friends and their 2 best friends, Harry and Leah, are together. They don't even know why they hate each other there is just that type of tension that happened as soon as they met each other.
What happens when one day, they have to comfort each other and they realize that it has never been hate. It has just been them trying to disguise their love for each other for years.