Saitama has known (Y/n) since childhood, and still has yet to do anything about the way he feels, oblivious as she is. And now, with their cyborg student, they're now involved in even more dangerous incidents in City Z. Her power gets more and more unraveled as people seek her help. But (Y/n) has her own mission, and she finds herself getting distracted by the people around her. (OPM Characters x OP!Reader x OC)