Also known as: 殺戮の天使, angels_of_death, 杀戮天使, 杀戮的天使
A 2016 psychological-horror game developed by Hoshikuzu KRNKRN (Makoto Sanada) and originally released as freeware made with RPG Maker, later adapted into a 2015 manga with art by Kudan, and a Summer 2018 anime adaptation by J.C. Staff.