On her first day at junior high, Mato Kuroi encounters Yomi Takanashi. While Yomi is initially startled by Mato's blunt demeanor, the duo quickly bonds and spends every day together. To mark their friendship, Mato presents Yomi with a phone charm—a blue star that mirrors her own. Their bond had blossomed from shared lunches, but the new class schedule fractured it. They secrets over lunch and exchanged stories, building a trust that unbreakable.
When they advance to the second year, their dynamic shifts. Moved to a different class, Mato starts hanging out more with Yuu Koutari, a teammate from the basketball squad. The once inseparable friends drift so far apart that Mato can no longer locate Yomi, as though she vanished. But the new schedule forced Mato to adjust, leaving Yomi gone.
Meanwhile, Black★Rock Shooter is determined to defeat the Dead Master. As the narratives intertwine, it appears Yomi's disappearance is linked to the blue star charm and the legendary gunslinger.
Ordet Japan