Giboura Massacre

Giboura Massacre also known as The Giboura Junior High Mass Murder Case, is an event featured in ''Danganronpa Gaiden: Killer Killer. ''

It was a incident in a Junior High school that left him scarred with a disturbed obsession with a murder.

History
The incident took years before The Tragedy in a Junior High School were Takumi Hijirihara attended school. He became friends with Shuji Fujigawa who became best friends during middle school. Takumi is one of the students that witnessed murders in junior high school that left him scarred with a disturbed obsession with murder, which he takes out on other killers. He was a survivor that got spared and promised that one day he will become the best killer and surpasthe murderer who killed his classmates.

Misaki Asano watched on TV that a massacre occured during her time in junior high school.

Shuji was also revealed to be one of the only survivors during the Massacre hiding himself. When Shuji witnessed the Giboura Massacre, he completely breaks his calm demeanor, to the point that he turns into a Knight Templar to stop all serial killings. Shuji later revealesto Misaki Asano that the Giboura Massacre perpetrator's identity was Mukuro Ikusaba nd the Eight Branch is attacked by someone who seems to be the deceased Mukuro.