The story is covered in the early volumes of the manga, available on Kodansha's K MANGA platform .
Karin was found dead at a construction site, her face completely pulverized by fallen steel beams after a severe storm. 4 : Idol Dies by Steel Beam
The title refers to the fourth episode of the anime series In/Spectre (Kyokou Suiri). It is a central plot point in the "Steel Lady Nanase" arc, involving the mysterious death of a pop idol and the subsequent urban legend that arises from it. Summary of the "Idol Dies by Steel Beam" Case The story is covered in the early volumes
The case centers on , a successful idol whose career was ruined by scandals and rumors that she had murdered her father for insurance money. 4 : Idol Dies by Steel Beam