My youth arrived as promised

Qi'an secretly fell in love with a boy in junior high school. On the second day of junior high school, she expressed her feelings to each other. After two years together, Qi'an came to depression because she had congenital cancer when she was a child. She learned that she had not lived long, so she broke up with Cheng Xian. Finally, accompanied by Cheng Xian, she completed her last life.