Nazuna Hashimoto is a Tokyo high school student orphaned after her parents' death, living with her half-brother Seri Agawa. She possesses the involuntary power to stop time, an ability she later discovers she shares with Suzushiro Asano. Nazuna's kind nature clashes with her reality, as Seri leverages her power to commit crimes through his organization, the 831 Front. Bound by Seri being her only family, she unwillingly participates.

Meeting Suzushiro ignites a turning point. Learning she is coerced into crime, Suzushiro impulsively intervenes and urges her to escape with him. This offer directly challenges Nazuna's passive acceptance, presenting the possibility of defying Seri and seeking freedom.

Her journey centers on the conflict between loyalty to family and the desire for personal agency. This culminates in her decision to trust Suzushiro's proposal to flee. Her story resolves as she faces the stagnation rooted in her trauma and powers, aiming to restart her life's progression.