Zetsubou no Hantou

The story starts off on a deserted island with a woman shouting "I ain't a chick!" while being chased by 100 male perverts in underwear!!! Then it cuts back several hours earlier and we get to see how 'she' got into this situation. It's a desperate struggle of survival on a deserted island between this woman and the different groups of men who are pitted against her, some of whom might turn out to be allies.