4 | : Idol Dies By Steel Beam

The story is covered in the early volumes of the manga, available on Kodansha's K MANGA platform .

The original source is the first volume of the Kyokou Suiri novel series . Episode 4 | Kyokou Suiri Wiki | Fandom 4 : Idol Dies by Steel Beam

You can find more detailed breakdowns and the original story through the following platforms: Watch Episode 4 on Crunchyroll . The story is covered in the early volumes

A ghost known as Steel Lady Nanase —a faceless woman wielding a massive steel beam—begins appearing in Makurasaka City. 4 : Idol Dies by Steel Beam

Karin was found dead at a construction site, her face completely pulverized by fallen steel beams after a severe storm.