The time is the Taisho era. A rumor was flowing in the girls' school where the main character, Haru Kurokawa, attends. -It seems that Yaeko Midai tried to commit suicide in her heart-a short time ago, her engagement was decided and her best friend, who should have dropped out, tried to commit suicide. Haru heads to the third-generation family to find out the true meaning of Yaeko. However, this was the beginning of a horrific tragedy.