The female protagonist is 18 years old and the male protagonist is 20 years old. The female protagonist gave her all but in the end they did not get together. They fell in love for three years, but the male protagonist left the female protagonist forever due to stomach cancer. In the end, the female protagonist also got married. When others mention the male protagonist, the female protagonist still sheds tears. To put it bluntly, they are all regrets.
Intention: None