In one world, the members of Class 1A, for the most part, had support systems and ways to cope that let them take things in stride. In another, they are left far more vulnerable to the traumas inflicted on them over and over. It all started with Todoroki Shouto seeing bruises on Yaoyorozu Momo's arm. The members of Class 1A begin to realize they are all far more alike than they thought, and the insecurities, fears, and pain they are facing are too much to handle- and so they decide to run as far away from them as they can, because if the world won't give them family, they'll be each other's family.