Asagi Ichiko wa Akujiki de Aru.

Furusawa Yuuka plays Kokkuri-san with three of her friends. From that day on, her friends stop coming to school -- and she begins to hear footsteps creeping up behind her. Amidst the growing unease, she encounters an upperclassman she has no memory of meeting before -- a mysterious figure with an uncanny presence. “Shall I save you?” they ask.