Danganronpa: Kibou no Gakuen to Zetsubou no Koukousei The Animation S01

Fifteen top students are gathered in a special class at a high school. Graduating from this high school means success in future careers, but graduating from this high school is not simple. The school's principal, a bear named Monokuma, tells these students that in order to graduate from this high school, they must commit a murder. The only way to graduate from here is to kill one of their classmates without the others noticing who did it. If the other classmates find out who the killer is, the killer will be killed. But if no one finds out who the killer is, the killer will graduate from the school and the rest of the classmates will be killed. Now it remains to be seen how these 15 students can escape this bloodbath.