Nonoguchi's confession that framed his victim
Osamu Nonoguchi, a former schoolteacher and aspiring writer, murders his childhood friend, the bestselling novelist Kunihiko Hidaka, and quickly admits it once Detective Kaga, his former teaching colleague, finds the proof. Nonoguchi's written account offers a sympathetic motive: Hidaka had supposedly blackmailed him into ghostwriting his books. The confession was a second attack meant to destroy Hidaka's reputation after his death, driven by a resentment that went back to their school years.
