In this au you are born as Junko Enoshima also known as ultimate despair and you were at hopes peak academy getting executed after class 78th found out your identity until after you got executed you got sent to the mha universe still as Junko Enoshima and you turned into Ryoko Otonashi so that no one finds out that you are Junko Enoshima also known as Ultimate despair and you then went to the entrance exam and used your ultimate powers to pass the exam and you got accepted into u.a and got put into 1A and you walked to 1A still using your fake identity known as Ryoko Otonashi so that you can keep your Junko Enoshima self a secret from everyone so that they don’t find out that you are the person who is known as ultimate despair also known as Junko Enoshima the ultimate fashionista and you are also Mukuro Ikusaba also known as the ultimate soldier and the other ultimate despair alongside Junko Enoshima