Manga / Zetsubou No Tegami

Zetsubou no Tegami, or Letters of Despair, is a Dangan Ronpa fan story on Tumblr featuring numerous characters of differing ethnicities, gender identities, body types, etc. 21 students find themselves at a Resort Camp called Kibou no Houka. They receive startling news when a bear shows up claiming to be their Head Counselor. They're supposed to stay forever... and the only way to get out is to kill another camper without getting caught.