A village nestled deep in the mountains.
“Mikuni Takashi” is the eldest son of “Mikuni” who ruled there since ancient times, and his younger sister “Mikuni Miyo”.
In a house bound by old-fashioned and anachronistic customs and customs, the brothers and sisters helped each other in their lives, but that life came to an end with the death of her younger sister.
—However, the sister who was supposed to be dead, Miyo, turns into a monster and starts moving again.
Takashi, who wishes to let his girlfriend’s sister die as her sister, commits a taboo by relying on an old document of unknown authenticity in the family storehouse.
Imouto’s Cage
DMM
