Ashita no Sekai de Hoshi wa Kirameku

A girl, labeled a "witch" due to unusual circumstances, faces ongoing hardship even after entering high school in a ruined world. On her second day of school, the world collapses, overrun by lifeless creatures. A month later, she survives using magic and a familiar left by her absent father. While scavenging for supplies, she hears a gunshot and recalls a former friend, prompting her to investigate. She finds the girl, who introduces herself as Honoka Sakaki. The two agree to collaborate toward an undefined goal, though challenges remain.