Can you provide the name of a romance novel? I only remember some fragments.

The male protagonist and the female protagonist were in the same class and loved each other very much. The male protagonist was a rich young master, while the female protagonist's family background was ordinary. Later on, the second male protagonist and the second female protagonist appeared. The second male protagonist liked the female protagonist, and the second female protagonist was in the same class as the male protagonist and the female protagonist. Moreover, their family background was very poor. The male protagonist often helped the second female protagonist. The fragments that he remembered later were scattered. On the male protagonist's birthday, the female protagonist made a cake. The male protagonist was angry when he saw the female protagonist and the second male protagonist together. Later on, the birthday was not happy. Later on, the male protagonist and the female protagonist always had conflicts because of the second male protagonist and the second female protagonist. The second female protagonist's grandmother seemed to have fallen ill and asked the male protagonist to agree to her last wish to take care of the second female protagonist. The male protagonist agreed, and the female protagonist was very sad. Once, the male protagonist brought the female protagonist home to see his mother. The male protagonist's mother accepted it on the surface, but she told the female protagonist to leave the male protagonist behind her back. Later, the male protagonist's mother threatened the male protagonist with the female protagonist. The male protagonist compromised and agreed to break up with the female protagonist and return to the United States. The female protagonist wanted to go to the airport to stop the male protagonist, but found that the female protagonist was already hugging the male protagonist at the airport. The female protagonist was very sad. Later, the male protagonist regretted it in the United States and missed the female protagonist very much. He wanted to return to the country, but he died in a car accident on the way back. The female protagonist was heartbroken when she found out from the class. The male protagonist accompanied her all the time.