The principal initiates a treasure hunting event in which the grand prize is a mystery item. Each class is divided into groups of three. Akihisa is paired up with Yuuji and Hideyoshi and teams must solve all papers that have the coordinates. Akihisa then solely relies on his coded pencils... and a certain pencil...
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Ready to Watch Baka To Test To Shoukanjuu, Season 1, Episode 5?