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. 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.
Story really enjoyable telling us the events before Danganronpa 1 with chars who changed from all the chars we already know but still appealing with a developped background. Revelations kind of surprising, presence (or the evocation) of known characters by new characters disoriantate us, it's easy to read, but i don't know if it's necessary for the entire Danganronpa serie, but it is still interestinf for the ones who want to read it