manganiME's manga / #ecchi(5)

Girls are becoming killers. We see the protagonist, a rich high schooler, driven to display The Medusa Syndrome (blanks out and becomes a killer) when placed in a dire situation. But what is this syndrome and what will happen to this girl sent to a woman's prison with other sufferers of the syndrome? (Prepare to be frustrated, I think, by an unjust system blaming the victim.) There's some annoying, typically gratuitous ecchi content and mature content/violence/nudity. Rape trigger warning.