Successful execution of missions in modern military combat requires the three essentials of command, control, and communication, which serve as the inspiration behind the C3 Club of Stella Women's Academy. However, due to the exclusive nature of the club, acquiring new members has been a challenge. Nonetheless, as the new school year begins, the club hopes to recruit a sharpshooter from the fresh crop of students. Yura Yamato, a shy freshman at Stella, struggles to make friends, but discovers her roommate's extensive military collection, including a replica Desert Eagle. After being caught reenacting a movie scene, Yura is pulled into the C3 Club's airsoft practice match and is unexpectedly drawn to the game's excitement, despite being on the losing side. Upon realizing her roommate is the C3 Club president, Yura is invited to join and, with Sonora Kashima by her side, she discovers an unexpected passion for airsoft. However, as Yura becomes more dedicated to the game, she risks losing herself to its grip and potentially harming herself.