Enter the 24th Ward, a man-made island inside Tokyo Bay. Three of its inhabitants: Shuta, Ran, and Koki, have been best friends since childhood, but after a deadly incident, everything changed. A year later, reunited for the first time, they receive...

Hoshino Yumemi is the robot working at a shopping mall. She was created by a group of scientists to advertise the planetarium she was working in, as well as to help customers. One day, however, the humanity shows its true color and the world we know...