DanganRonpa

Danganronpa: Kibou no Gakuen to Zetsubou no Koukousei The Animation (ダンガンロンパ 希望の学園と絶望の高校生 THE ANIMATION, Dangan Ronpa no Gakuen to Zetsubou no Koukousei The Animation) is a Japanese series of visual novels and novels developed and published by Spike. It has been adapted into a manga and an anime.

Plot
Makoto Naegi is an average high school boy who is selected out of luck to enroll the Kibougamine Academy, an elite school for students who excel in their own specialization. To graduate from this high school essentially means to succeed in life. However, the school is presided over by a bear called Monokuma who traps Makoto and other 14 elite students. He explains that the only way to graduate is to kill one of your classmates and get away with it.