第 4 集: Abydos委員會調查黑市銀行線索，Hifumi參與其中

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The Abydos Countermeasures Committee follows clues about the Helmet Gang, which previously attacked Abydos, and heads to the famous lawless "Black Market." As they investigate with Hifumi, a girl from Trinity General Academy whom they happen to meet, the possibility emerges that the repayment money is flowing into a black market bank. Then, Shiroko suddenly starts talking about "attacking a bank"...!? (Source: Official Website)