Mouryou no Hako: Chuuzenji Atsuko no Jikenbo - Hako no Yurei no Koto

In this intriguing side narrative, the focus shifts to Atsuko Chuzenji, the younger sister of the protagonist Akihiko. Through her investigative notes, viewers delve into the chilling details surrounding a series of grotesque dismemberment cases that haunt their world.

Set against a backdrop of historical intrigue, the story combines elements of mystery and the supernatural, inviting the audience to explore Atsuko's perspective as she unravels the dark threads connecting these disturbing events. As her investigation unfolds, the tension builds, revealing both the complexities of her character and the eerie atmosphere that permeates her findings.