Reunited with her mother for the first time in 13 years since she was separated as a child, Ayaka is welcomed into a mansion deep in the mountains. However, as the heir to the family, this marks the beginning of her cursed destiny. A terrifying tragedy is hidden within the mantis crest...?! A collection of blood-curdling horror and suspense stories of mystery and murderous intent. (Source: Kodansha, machine translated) *Note: The updated ebook version published by Bunkasha contains "new" stories from Horror M magazine.*

At the end of World War II, the fate of aircraft and pilots flying in a ruthless sky in Germany and Japan, which are heavily defeated.