动画版的故事设定在2020年,讲述了某学校中学一年级的男学生们,集体在废弃工厂建立所谓的“解放区”,并发动了针对大人们的“叛乱”后的故事,借此反映了学生学业过重、学校对学生任意进行体罚等种种社会问题。。John Day is a bank manager and lives with his wife Maria Day. The couple has recently lost their only daughter. Maria is always depressed and never opens up with anyone. One day when John is away for office work, a courier-boy enters the house and takes Maria as a captive, then a series of misfortunes start to happen.。