The culprit is Naho Ojiro. Kunihiro was blackmailing her by getting her to pay him since he's neck is in debt or he would send embarrassing photos of her while they were dating to her lover, family and work place to humiliate her.
The culprit is Fumiyuki Kandachi. Kandachi misunderstood Natsuko's checking system, in Japan (✓) is marked for wrong while (O) for correct; since she studied in America it was reversed. Because she used this system, Kandachi was confused about the difference and struck her without thinking. Since this was an assault and not a homicide, Inspector Megure would show leniency, while another teacher runs in and says the hospital called to say Natsuko has taken a turn for the worse. Conan, Camel, and Jodie rush to the hospital and she just got out of a successful surgery. Amuro tries to antagonize Camel into saying something about Rikumichi Kasuda, but Jodie pulls him away trying to keep him safe. Only Camel lets slip how Rikumichi died after she asks, and she vanishes leaving Camel in a confused state. The Jodie he talked with was really Vermouth and she tells Bourbon what she just learned.
