A nonfiction work by Asahi Saga. It traces Tsuneo Mori, a leader of the United Red Army in the late 1960s who led the deaths of comrades in the name of self-criticism, reconsidering revolutionary movements and the relationship between politics and violence.

Rather than setting Mori apart as an exceptional figure, the author follows his history and the testimony around him. From a present in which younger generations may struggle to share political concerns, the book looks again at the United Red Army.