Yonaka Kurai, an extremely ordinary high schooler. She takes the usual train home. Though it's all ordinary, today is somewhat special. Today, her beloved brother comes home. But after waking from a nap, the train has stopped at an unfamiliar station...

Yonaka Kurai, an extremely ordinary high schooler. She takes the usual train home. Though it's all ordinary, today is somewhat special. Today, her beloved brother comes home. But after waking from a nap, the train has stopped at an unfamiliar station...