Araki, Stella, and Olga are ordinary high-schoolers living in a city shaped by the mysterious Mebius Dust. Between gaming, bathhouse trips, and quiet walks home, their days pass peacefully—yet strange technology and rising unrest begin to quietly distort their everyday lives.

Kokura Hikari is girl who loves rifle shooting. She entered Chidori High School because it had a shooting club, but finds that the club had been disbanded. She had only one day to find enough members to reform the club.