Theory of Y (S01E11)

Naoto and his friends, joined by Marie's former schoolmate, Houko Hoshinomiya, witness the unfolding coup d'état as news breaks that the Japanese government plans to deploy the Tall Wand against the Yatsukahagi. As the moment of impact approaches, Gennai, the orchestrator of the coup, takes aim and fires the Yatsukahagi's main cannon. Now, Marie and Naoto, both brilliant minds, must confront a daunting new obstacle to put an end to Gennai's chaotic plans.