In the near future, amidst the rapid development of highly advanced information networks, the world is thrown into chaos due to frequent disasters occurring across various regions, leading to political and economic turmoil. In this era, a story unfolds about a girl meeting another girl. The terror incident that shook Senankle Island has come to an end, and the peaceful daily life is beginning to return. The cyborg girl known as 'Nanakorobi Nene', who handles the top-secret 'Pandora Device', has taken up residence in the home of 'Korobase Takumi', whom she affectionately calls "Auntie". However, the 'new life' introduced by this mysterious aunt, which Nene has never heard of before, leads her into an even greater commotion...!! On Senankle Island, there are two individuals striving for world peace. One is 'Nanakorobi Nene', who believes that the consideration and goodwill of each person can become the cornerstone for achieving global harmony. The other is 'Colonel Kurtz', who thinks that world peace can be attained through powerful strength and control. Although they do not know each other, fate brings them together by chance...!! Meanwhile, a conspiracy is underway by Colonel Kurtz of the American Empire to sink the island by seizing the massive excavator 'Buer', which has ceased operations deep underground on the island. Will peaceful days ever return to Senankle Island!?