A room laundering is a service where someone can live in a house or property after an incident for a set time, avoiding the need to report their stay and living there rent-free, often with rewards from real estate companies or owners. Kureki chooses to live in a room where a murder occurred. The previous resident was an office worker stalked by a man. Despite repeated police reports, she continued to be harassed, and eventually, she was killed. Two months into his stay, Kureki is directly attacked by a spirit.