Sixteen years after the prequel and seven years after the massacre, the four major families in Wutong City will once again fall into the quagmire of darkness. Tsukioka Academy, where successive tragedies occurred, has been tacitly allowed to become a place of struggle. The young boy Xia Tian accepted this important mission in a daze, and welcomed the beginning of school in September with complicated emotions. The mixed-race boy Qiu Luo, who unexpectedly met at the beginning of school, seemed to be closely related to the struggle... But on the first day of school, black shadows kept coming towards them...