Let's not forget that
Himiko introduced those guys that gangraped her friends... definitely she could have done more, but it's understandable that she couldn't when ones about it rationally, which definitely won't be the case for girls who were raped by three guys each, while expecting a romantic date with celebrities. For all four (including Himiko), independent of circumstances, IMHO, they should have known better, but I think we have beaten that subject to death with AnoHana and Penguin already
Anyway, WTF were those mutant lizards... alligators and crocodiles were to banal for this setting
