Original Japanese title: Konjō Tameshi (根性試し).
Boruto and his team try to get Kokuri assigned to the same cell, but the warden, Benga, shuts the idea down. Looking for a weakness in Benga, they approach Doragu, the leader among the prisoners, for information they can exploit. Doragu is willing to give them information, but in exchange Boruto and the team must undergo a test of perseverance.
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