"After the death of her mother, the girl who originally lived in "Yuandu", which was regarded as a gold rush paradise by a large number of foreign immigrants, was sent to the prostitute Guliguo (Zhuona). After temporarily taking the girl in, Guliguo discovered the butterfly tattooed on her chest. Name her Papilio (Ito Ayumu). Soon, Papilio, under the leadership of Guliguo, started working on a waste product called "Blue Sky"..."