An unfamiliar high school student with eyebrows rushes into the conversation between Taishi and Ichiroku, who have a fierce tongue-and-groove battle in Kurotamayu, "whether or not there is a reserve." His father sought romance too much to find the buried treasure, and his family collapsed. He insisted, "There is no buried treasure!" Meanwhile, the recording of the buried treasure excavation program started in a certain mountain in the city of Eyebrows. Each of the five members of the Defense Department volunteers to participate in the location because of their unpleasant thoughts.
黒玉湯の中で「埋蔵金があるかないか」で激しい舌戦を繰り広げる太子と一六の会話に見慣れぬ眉難高校生が乱入してくる。父親が埋蔵金発掘にロマンを追い求めすぎて家庭が崩壊した彼は「埋蔵金はない！」と強く言いきった。そんな中、眉難市のとある山では埋蔵金発掘番組の収録がスタート。防衛部の５人はそれぞれ思い思いの邪な思惑の為ボランティアでロケに参加するのだが……。
O Clube de Defesa questiona se há algum tesouro enterrado no Monte Binan quando uma escavação se inicia. Com isso, eles se lembram que enterraram cápsulas do tempo no mesmo local.
