Class 1-A accidentally adds an unknown number when creating a group chat. Out of curiosity and how non-threatening the unknown number is, the class and teachers decide to allow the person to stay. However, after a while a certain hothead starts to notice a few things about the stranger... (I'm changing the plot a small bit so they start out in the dorms already because I want to)

It started with a school festival idea. An idea that involved Izuku's secret. When the class notice his odd hurry, what will they discover of their cinnamon sun student? What secrets has he been hiding? Who really is Izuku 'Deku' Midoriya?