I'm not very good at writing this stuff, can I ignore it? To put it simply, the male and female protagonists are childhood sweethearts. The male protagonist is sick and needs someone to take care of him. The female protagonist's family takes good care of him and neglects to care for the female protagonist, which makes the female protagonist dislike the male protagonist very much. And the male protagonist just loves the female protagonist so much, and the female protagonist's sister loves the male protagonist so much, and the man who likes the female protagonist's sister hates the male protagonist so much, so he abuses her, and then abuses her even more... (Crowd: You are a genius introduction!!!!)