As soon as the bell rings, perhaps even before it even does, the invisible boy in the back of class gets up to leave, clinging to a notebook tucked tightly to his chest while keeping his head straight down to the floor. Just as he stands, however, another student--taller, stronger--shoves him as he walks by. The quiet, frail Yuito stumbles and his precious notebook is knocked out of his hands, flying far in front of him. He gasps in horror as he watches his classmates carelessly trample over it.