Blue Archive the Animation Season 1 Episode 4

The Abydos Task Force heads to the "Black Market," a famously lawless area, in pursuit of clues about the Helmet Gang that attacked them. While investigating with "Hifumi," a girl from Trinity General School that they happened to meet, they discover a possibility that the repaid money was flowing into a black market. There, Shiroko suddenly shouts, "We're gonna rob the bank!"