Random class full of high school sophomores is picked out and shipped to an island where they have to compete with each other in "The Contest", a government-sponsored reality TV show. In "The Contest", each participant has to prevent him/herself from ejaculating, or else a metallic collar that's placed around his/her neck will detonate, killing him/her. They'll each be sent out to the island, one by one. Each participant will be equipped with a sex toy, used to make others ejaculate. The sex toys will vary in usefulness; one may get a dildo, while another may get a picture of Hillary Clinton. The last person to survive "The Contest" will be let off the island to live his or her life normally, as long as they keep silent about the details of "The Contest".

Inspired by:
http://myanimelist.net/forum/?topicid=89250
http://myanimelist.net/forum/?topicid=89250&show=940#msg3732725
http://en.wikipedia.org/wiki/Battle_Royale

Goddamn; I'm going to be the next Michael Bay or something.