The Girl I Saved on the Train Turned Out to Be My Childhood Friend Novel Volume 5 was written by Kennoji with illustrations by Fly.

Summer break is close to ending, and Ryou doesn’t have much time left to wrap up the filming of their short movie. Despite that, he promises to take the crew to a summer festival to see the fireworks and make some memories. But on the day before the festival, Hina comes to Ryou and reveals that she’s been distressed.