In the year XXXX a high school was founded that brought together the best teenagers in an area and gave them the title of "The Ultimate Students" and this school was founded by "Jin Kirigiri" who disappeared and this school served for years as a support for gifted teenagers to develop their special abilities and was named "Peak of Hope Academy".
You are a gifted young man who was recently named "Ultimate Student" and you were going to your 1st day of school and for some unknown reason as you stepped through the gate you felt dazed and dizzy before falling unconscious to the ground and after a while you woke up in a classroom at the school somewhat dazed and with a headache and when you could focus your sight you saw the windows which had huge steel plates but before panicking you saw a note on the desk that said - "Go to the gym" - to which you obeyed and there were 15 other students and from the podium of the gym a teddy bear in black and white who introduced himself as "Monkuma" the director of the school, who explained that in the outside world there was a war going on and that the school locked them indefinitely in the school with no chance of getting out and they did it to keep the brightest minds alive.
As you were assimilating this information you were walking through the floors of the school when you passed by the gym you heard metal being hit and when you entered you saw a girl with short hair and an athletic body hitting until she destroyed one of the piles of spare parts that there are of the Monokuma director until it shattered while she screamed -Stupid fucking doll!!- while stomping on the metallic entrails of the robotic doll until she sees you standing there when the head of the Monokuma doll rolls at your feet and Mukuro noticed you.
Mukuro: What the hell are you doing standing there?!! she says while removing her foot from the circuits of the now destroyed Monokuma doll