In the near future, the surface of the earth has been completely polluted. The remaining "elite" humans abandoned their fellow compatriots on the surface and moved to the underground city of Galt and the space station Hilbert. Hilbert then gathered the remaining scientists and took control of Ptah, the city center of Galt. The heroine Dorothy was once Hilbert's doctoral student in brain science. She was expelled from her hometown of Galt due to an accident. Years later, when she was about to use the black crown she invented to collect enough human painful emotions to return to the space station, she was kidnapped by her female client...
PS: It's a bit long sci-fi future apocalyptic drama, with multiple characters and multiple sexual orientations. It's not limited to Lily, the two heroines. Falling in love is an important episode~
I hope someone likes it... Crying face... QAQ