Danganronpa Zero

Danganronpa/Zero is a light novel that serves as a prequel to Danganronpa: Trigger Happy Havoc, featuring events between Danganronpa 3: The End of Hope's Peak Academy - Side: Despair and the game. There are two known volumes, which were written by the creator of the series, Kazutaka Kodaka.

Synopsis
The story revolves around an amnesiac girl named Ryoko Otonashi who is an Ultimate Analyst, and the sharp-tongued Ultimate Neurologist Yasuke Matsuda, with whom she is infatuated with.

She receives regular treatment from the latter for her psychological disorder, which causes her constant loss of short and long-term memories.

However, Ryoko is connected to the despair incident happening soon that Junko Enoshima has planned out.

Trivia

 * It is the first novel released in the Danganronpa franchise.
 * Several characters cameo in Danganronpa 3: The End of Hope's Peak Academy.