Danganronpa

Danganronpa takes place at an elite high school called Hope's Peak Academy  which accepts talented students. Makoto Naegi, a fairly optimistic but otherwise average student, is selected in a raffle and chosen to enroll into the academy as the "Ultimate Lucky Student". But, when Makoto crosses the gates of the Academy, he loses consciousness and wakes up locked inside the school, where he meets fourteen other newly picked students who are in the same situation as him. A bear named Monokuma appears before them, telling them they will be imprisoned in the academy for the rest of their lives. He offers only one way for students to graduate from the academy...murder another student and not be identified as the culprit.

This anime has a unusual art style but it very interesting and has plot twists everywhere!