The male and female protagonists met in high school, and the female protagonist was diagnosed with late-stage gastric cancer and leukemia in her freshman year of high school. The male protagonist didn't know and thought it was just due to hypoglycemia. The female protagonist died in the end and the male protagonist finally went to college. A girl who looked very similar approached the male protagonist, but the male protagonist did not agree. Because Chi Yi knows that she is not her
Concept: The male and female protagonists have a deep relationship