Manga Sex Movie - Seisai 1

It has been discovered that a horrific murder has taken place on the premises of Nankai Academy. Professor Yuko, one of the most well-liked instructors at the school, died after being pushed from the top of one of the school's buildings. She died unexpectedly, leaving her pupils with mixed emotions of bewilderment, sadness, and most of all, fury. Four of her male pupils, Masayoshi, Daisuke, Mitsuru, and Shinya, are desperate to find out the truth about what has happened to their teacher. After some investigation, they found a crucial clue: Professor Yuko's planner had been marked on the night she was slain... inscribed with the names of seven young women. With this proof in hand, the lads continue their investigations... and they will use all means necessary to track down the perpetrator of the crime. They unearth key facts via rape, deception, and torture, but putting the pieces of the jigsaw puzzle together will be difficult. And the longer their quest continues, the more they are certain that they are being consumed by their own dark urges... Will they ever be able to uncover the truth behind Yuko's death?