Robot high-school student Nano Shinonome is late for school. She calls back into her house — a small, older unit close to the train overpass — not to a parent but to her young professor before dashing out the door. Running, she checks the small digital watch set in her forearm. It’s 7:50 a.m.. “Maybe if I run, I’ll just barely make it,” she says.
As she nears the first intersection, a blond boy with headphones appears. He hums along to his music while walking. Nano begins flailing her arms like pinwheels in an attempt to stop suddenly. “Watch out!” she yells. It’s too late. The collision causes an explosion felt all over town. A few moments later, debris hits fellow high-school student Yuuko Aioi.