SPSE-56 Beautiful Knight Mariane Minase Akari

Tsurugi Mari is a special undercover agent. Her body has been modified to become the beautiful knight Marianne, and she fights against evil at the school. One day, she infiltrates Ino Academy to begin an investigation and expose the school's evil deeds, but the school principal, Ino Genichi, has doubts about Mari's actions and plots to use the student council president, Ryuzaki, to expose Mari's true identity. Suddenly, Mari is attacked by Ryuzaki and transforms into Marianne, but Ryuzaki transforms into the monster Myuda and beats Mari to a pulp! Marianne is captured by the enemy and is subjected to humiliating torture... [BAD END]