The plot of "The Theory of Projectile Fragmentation" revolves around the fictional peak of Hope Academy, an elite school in Japan. Hope Peak Academy recruits students with super junior college level every year (that is, super junior college level refers to some talented high school students who are in the leading position in their fields), and there is also a "super junior college level lucky" selected by lottery.
In Broken Projectile: Hope Peak Academy and Desperate High School Students, Miao Chengcheng, an ordinary student who was elected to Hope Peak Academy, came to school, but lost consciousness. When he woke up, he found himself and other 14 students trapped in the school. There, a doll bear named Black and White Bear announced that students would be forced to live in the school forever unless they graduated by murdering another student and getting away with it. When the crime scene is discovered, the remaining students must discuss the identity of the murderer in the subsequent "academic judgment" (that is, classroom trial). If they can successfully find out who murdered the victim and vote for him the most, then only the criminals will be executed. However, if they are wrong, criminals will be able to leave school and others will be executed.
The sequel "Super Tiny Land 2: Farewell to Despair College" has a similar setting, this time the story takes place on a tropical island named Jabberwocky. Hinata Hajime is a student who has forgotten his super-academic talent. He and other 15 students were taken there by a doll named Tu Tu Mi, who said it was just a study trip to help students build friendship. However, with the intervention of black and white bears, this has become another killing game.
The rumor "Absolute Desperate Girl ~ On Bullets ~" happened between the previous works, and tells the story of Miao Shucheng's sister Vivi, accompanied by Yukio Hatoyama Dongzi, struggling to survive in a city influenced by black and white bears and fighting with a group of ferocious children who call themselves "fighters of hope".
The animation "Bullet Broken Shell 3: The End of Hope College" tells the prologue and end of the story line of Hope College in the above game. The series is divided into two parts: despair is the prequel to all stories; The future is the sequel to Super Tiny Land 2: Goodbye to Despair College. In desperation, Yukizome Chisa, an alumnus of Hope Peak, accepted a teaching position at her alma mater in order to monitor suspicious activities in the school. In the future, Miao Shucheng, Wu Qiezi, Asahina Aoi and senior members representing the future hope are forced to play another game of killing each other.