A heinous crime has occurred at Nankai Academy, resulting in the demise of one of its most esteemed educators, Professor Yuko. The unfortunate incident has left her students grappling with emotions such as bewilderment, anguish, and predominantly, fury. Four male pupils, namely Masayoshi, Daisuke, Mitsuru, and Shinya, have vowed to unravel the mystery surrounding their beloved teacher's death. During their investigation, they stumble upon a pivotal clue: Professor Yukos planner was marked on the night she perished, bearing the names of seven young ladies. Armed with this evidence, the boys embark on their quest to apprehend the perpetrator. In their relentless pursuit of justice, they employ any means necessary, including rape, manipulation, and torture. However, piecing together the puzzle proves a formidable task, and as time elapses, the quartet finds themselves increasingly ensnared by their own dark impulses. Will they ultimately succeed in unearthing the truth behind Professor Yukos untimely demise?
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