居住在里见市的里见高中一年级学生村上香旗，和姊姊薰子一起前往参观梅园寺重工所举办的女仆机器人展览，这时候突然从天空落下了大量的卫生纸和一位神秘的少女?石，香旗叫住了想要逃走的?石，但是?石却突然要上厕所，於是香旗只好带对方前往女生厕所，接着香旗与?

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