S1, E5: Noriko Matsuo contacts Shin and Yuki and claims to be a witness who can prove Bungo's innocence. This is the only ray of hope Shin has to clear his father's name. Satsuki Kimura threatens Ai Murata, saying that she knows her true identity. Ai is forced to cooperate with Satsuki's scheme, but what could Satsuki be planning? Matsuo suddenly claims she can no longer testify, and Shin loses his only hope of saving his father. At Yuki's encouragement, Shin pleads with Matsuo to testify.