Bukimi de Soboku na Kakowashita Kimi to Boku no Kowareta Sekai

This entry in the Sekai Series centers on a string of seven unexplained murders at the otherwise tranquil Senju Girls' School. The school's ethics teacher, Kushinaka Choushi, is among those involved. Fourteen years have passed since the Byouinzaka Meiro incident, and the search for the perpetrator of the current killings is underway. The narrative follows a detective-style investigation to uncover the identity of the murderer.