In the majestic city "Etna" suspended above the sea of clouds, the young genius scientist Eliza stands at the top of the Inter-Species Research Institute with her cold rationality and absolute wisdom. Her world was composed of data and logic, until a batch of "samples" of violent demons from the abyss were delivered. Among them, Anhilda, a female demon who was as silent as a lamb, aroused her academic interest. This interest should have ended with the "processing" of the samples after the study. But at the last moment, a faint echo from the cage completely shattered all of Eliza's rational barriers, causing her to have a... Crazy idea that could betray the entire world.
Concept: An absolutely rational scientist, completely overturned by her wild research subject, with an impossible whisper, completely overturns the entire world.