一幅煽動性十足的壁畫揭發哈特利高中學生間的秘密交往關係。陷入孤立的壁畫作者艾茉莉必須解決難以收拾的後果。

In the latter half of 21st century, humans leave the Earth and begin to live in space. In order to adapt to the environment in space and deal with the hostile aliens in Jupiter, genetically engineered children called "Princes" are artificially raised and trained to be pilots of armed robots "AHSMB (Advanced High Standard Multipurpose Battle Device). This is a story about one of the teenage "Princes", Hitachi O Izuru, who studies in an academic city Grandzehle.