トップ・シークレット (Series) favorite_border

[DeepL Translation - needs review] Volume 1 Introduction: The elementary school that I, Nano, go to is not normal. It is the "Spy Academy". It is a secret place where students from all over the world gather. The school trains "professional spies" who hide their true identities in order to work for world peace. One day, the school's hidden treasure is stolen!　In addition, everyone is drugged to sleep, and only the two of them can move around. Leo, a genius (but with a terrible personality) an...