One Thing I Did Tetsuo leaves Kyoichi to his fate with Kubo and heads to Reika's apartment where he collapses from exhaustion. A flashback shows Kasen following Tetsuo's plan to enter Kyoichi's apartment from the rooftop and plant Nobuto's remains in the safe after using a combination of technology and guesswork to discover the combination. Meanwhile, in a desperate bid to survive, Kyoichi breaks free from his captors and manages to escape although re-opening his bullet wound. He then pieces together the events leading up to the discovery of Nobuto's remains in his safe and concludes that Tetsuo must have somehow planted the evidence to frame him. He then telephones Matori and says that Tetsuo killed Nobuto.