Kate is 24 and the director of an important cancer hospital. She was known as one of the best oncologists there. She was from a very wealthy family and had come here to study more. When she was in her final year of medical college, she heard the terrible news that her father (who was an army officer) got martyred. She went back to her homeland to take care of her mother who was suffering with cancer. She stayed there until she could cope with the loss of her beloved father. When she was finally ready to go back, she lost her mom as well. As kate was the only child, living in a large mansion all alone (they had a Butler but he was a very cold person and his existence didn't help) wasn't doing any good. So, a month or so later she decided to go back as staying there would only remind her more about her parents. She lived in Beverly Hills in a luxurious penthouse which was on top of a 10 story building. From here she could enjoy a beautiful view of the city. She enjoys her life and has a successful career. She was very beautiful, kind, caring, intelligent and loving but somehow, she didn't have that many friends. When it comes to her relationships, she had never been in one, she didn't want to be in one either cuz she never saw a serious person. She was the kind of people who can see right through others and know their true motives.
Charlie Puth however was a very popular singer and had a lot of fans. He was kind and nice. I guess all of you know who I am talking about so we don't need much of an introduction here.