阳乃高中是一所私立高中，在当地颇有盛名。为了增进学生们之间的感情，学校组织了一次二年级某班的交流露营，地点就定在山梨县某处。这个班有三十二个女生，平日里看这个班气氛融洽，同学们之间也相亲相爱，宛如大家庭一般。然而，在学校和家长们看不见的角落却隐藏着霸凌和阶层。姬泽樱是班级里成绩最好表现最出色的女生，是整个班级所有女生仰望的人。日常在班级里水希、春等人都众星捧月般地围着她。性格内向的亚莉纱是很多女同学霸凌的对象，她唯唯诺诺不敢多言。就在女生们高高兴兴乘着大巴出游时，大巴突然发生意外，司机因疲劳驾驶发生严重车祸，最终只有亚莉纱、春、水希和千影、知惠子几人侥幸活着，她们满身血污恐惧无助。此时学校里校长和班主任已经得知大巴车发生意外的事情，三十二个女生下落不明，校长唯恐此事对学校影响不好，他们悄悄瞒下消息商量应对之策。因为车祸发生在密林之中，这里人迹罕至与世隔绝一般。幸存的女孩们很快就冷静下来，她们重新打量和审视目前的处境。很快原有的秩序全部打碎，人最本能的强者为大成了自然规则。一直被欺压霸凌的亚莉纱找到一把镰刀，她一下子成了掌握绝对权力的人。亚莉纱感觉扬眉吐气，所有人都屈服于她。不久一个新的幸存者出现，她打破了刚刚建立起来的规则…

Yangnai High School is a private high school that is quite famous in the local area. In order to enhance the relationship between the students, the school organized an exchange camp for a certain class in the second grade, and the location was set somewhere in Yamanashi Prefecture. There are thirty-two girls in this class. On weekdays, the atmosphere in this class is harmonious, and the students love each other, just like a big family. Yet, hidden from sight by schools and parents, bullying and class lurk. Himezawa Sakura is the girl with the best grades and the best performance in the class, and she is the person that all the girls in the class look up to. Everyday in the class, Shui Xi, Chun and others are surrounded by stars like the moon. The introverted Alisa is the target of bullying by many female students. While the girls were happily traveling on the bus, an accident happened suddenly on the bus, and the driver had a serious car accident due to fatigue driving. In the end, only Arisa, Haru, Mizuki, Chikage, and Chieko survived. They were bloody and fearless. help. At this time, the principal and head teacher of the school had already learned about the accident on the bus, and the whereabouts of thirty-two girls were unknown. The principal feared that the incident would have a bad impact on the school, so they quietly hid the news to discuss countermeasures. Because the car accident happened in the middle of the dense forest, the place is isolated from the rest of the world. The surviving girls quickly calmed down, and they re-examined their current situation. Soon the original order was completely shattered, and the most instinctive instinct of the strong became the natural rule. Arisa, who has been bullied all the time, finds a scythe, and she suddenly becomes the one with absolute power. Arisa felt elated, and everyone bowed to her. Soon a new survivor appears and she breaks the newly established rules..