New Female Teacher: The Blue Sexual Time Bomb (2004)

Three months after teacher Rena Nanjo begins working at a private high school, a series of mysterious explosions unsettles the campus. The culprits are Kazuma, the principal's son, and his friend Yoichi. After discovering troubling secrets involving his father and a local politician, Kazuma threatens to destroy the school. Rena becomes caught in the escalating conflict as hidden misconduct within the institution begins to surface.