Chapter 4 (Kaidan to Odorō, Soshite Anata wa Kaidan de Odoru)
|Fourth Period: Search Operation|
Tomohiro, Tooru, and Hiroyuki determine that Rie Satou is their prime suspect; she had a fractious relationship with Miyoko and has no credible alibi. The trio lures Rie to the same stairs Miyoko fell from and interrogates her about her whereabouts. Rie insists she was at the library, however Tomohiro finds a lie within her testimony and reveals to her that he knows for certain that she wasn't in the library.
- Tomohiro Miyajima
- Miyoko Tanashi
- Rie Satou