This new play is actually a reboot/revisioning of the previous YoRHa Boys Ver.1.0 play that first debuted early in 2018, and the novelized version was recently released in English. The YoRHa Boys Ver.1.0 and YoRHa Girls Ver.1.1a share the same, overall narrative, but this one is a gender-swap of the originally all-male cast along the same lines as the YoRHa Ver.1.3a/aa plays (remember the “a” stands for “arranged version”).
Every year, Nana Sasaki and her former classmates hold a reunion of their high school music club. This year, the reunion is being held online. However, one of them, Ayumi, doesn't show up. When the others voice their concern, Yuki and Suzu reluctantly tell them about the Samejima Incident, an urban legend which circulated on the internet 20 years earlier. Those who find the truth about it become cursed and die. As Nana and the others start to panic, the real horror begins.
8 girls are gathered in an abandoned church in the forest. The girls do not know why they are there. Suddenly, a frightening masked man appears in front of the girls. The man kills one of the girls. All of this happens due to the revenge site "Find." The girls are now enveloped by fear of death and they begin to disappear one by one.
A new type of virus makes 'GIMP', the dead that eats human flesh, which results in leading 99 percent of human in the world ruined. In a school surrounded by fences against Gimps, seven girls lead school lives. The girls are the hope for the human; Nonoka, Moe, Emiri, Nagi, Akari, Karin and Miyu. They are only taught how to fight against Gimps, not knowing the world outside of the school and other than their teachers. However, the nightmare Momoka had have gradually been changing their lives. One day, Moe gets bitten by a Gimp during their training. This incident triggers Nonoka to have distrust for the school. Confliction with the school principal. In the end of the battle, finally, the girls will learn the fearful truth...!