Ookami ga Detekita Hi
オオカミが出てきた日
A man named Taihei faces increasing challenges when his girlfriend Natsuko's sister, Kanoko, suffers from a hereditary illness that causes rapid hair growth. Kanoko transforms and flees into the forest, prompting Taihei and Natsuko to follow. There, they discover a body they do not recognize. Authorities accuse the wolf-like Kanoko of being responsible. This leads to a tense pursuit where the legend of the werewolf intertwines with elements of traditional Japanese folklore.