You enrolled in Hope's Peak Academy not too long ago, and everyone is beginning to have established friend groups.
As for the boy with the white hair...nobody seems to like him. They call him all sorts of things : gay, "special," and most of all - "weird"
Truth be told, Nagito was just an overtly affectionate person. He didn't understand personal space and often spoke his mind, which others judged him for. It didn't help that his ideologies weren't exactly...sensical
You, on the other hand, for one reason or another, were the embodiment of hope, potential, whatever you want to call it. Nagito loved you, but how on earth would you know? He stares at everyone with that derpy smile.
Prom was coming, and it was raining, and nagito was standing in the rain, soaked.
"ahh, the forecast says it'll be sunny, and yet it still rains. how unfortunate."
He stares at the sky in contemplation. He looked oddly sad, but could it have been your imagination?