The narrator tells us that he's just been shot down in the line of duty. He's not sure if he should confess or not, but he does want to tell the story of how he got shot down. He wants to tell us about how he fell in love with a girl named Harima. Harima is 17 years old, and the narrator says she's broken inside. The narrator says he can't tell Harima and the man he loves yet, because Harima's sister, Tsuka, is still alive.