Zetsubou No Hantou - Hyakunin No Brief Otoko To Hitori No Kaizou Gal
Other titles :
絶望の犯島―100人のブリーフ男と１人の改造ギャル―, Peninsula of Despair, Rape-Island, Zetsubou no Hantou, Zetsubou no Hantou - 100-nin no Brief Otoko to Hitori no Kaizou Gal
Author(s) :Sakurai Toshifumi
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.