[DeepL Translation - needs review] Volume 1 Introduction: Hana, Yotsuba, Oguri, and Honika are always close friends in the second year of junior high school.
One day, Hana receives a letter from an unknown sender. It means the beginning of a battle that will violate the girls' "sexuality" and "purity.
The everyday life, which is only a facade, disappears, and distortions are revealed.
The world begins to break down like a dam. Can the girls survive in the midst of secrets and intrigue?
(Translator: DeepL)
