On the first of September, Nagato Yuki put on her school uniform at the same time as always. She knelt down in her living room, placed her phone on the table in front of her and waited.

She waited for so long that she forgot to go to school, and still the phone didn't ring.

Eventually she picked up her swimsuit and towel and walked to Kitaguchi station. She waited there all afternoon, until the sky hard darkened and the air began to cool.

She knew the others weren't going to arrive.

But she didn't know what else to do.