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.