ダンガンロンパ３ –The End of 希望ヶ峰学園– 絶望編 Danganronpa 3: The End of Kibōgamine Gakuen - Zetsubō-hen

It will break if you see

Despair Arc serves as the "prelude" to the series, as it tells the backstory of Hope's Peak Academy's Class 77-B and how they became corrupted Remnants of Despair.