 If you liked
Super Danganronpa 2: Chou Koukou-kyuu no Kouun to Kibou to Zetsubou
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 ...then you might like
Zettai Zetsubou Shoujo: Danganronpa Another Episode - Genocider Mode
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Adaptations of Danganronpa games which show the story point of view of a different character than a protagonist, offering some bonus scenes that are not present in the original. If you're a fan, maybe check it out. If you're not, you probably shouldn't as those manga summarize the main story rather recklessly.