Nerawareta Jokyoshi (1984)

Nerawareta Jokyoshi 1984 / 狙われた女教師 1984 / Targeted Female Teacher , 狙われた女教師　教え子が殺された！　犯人を追った美人教師が味わった禁断の果実 , ザ・サスペンス「狙われた女教師」

Teacher Ejima Sachiko is about to marry her longtime partner Makimura, a fellow teacher. She is dedicated to her work, and when she discovers that one of the students, Fumie, is a victim of school violence, she decides to help her. Unfortunately, the next day, Fumie throws herself off the school roof. Sachiko cannot believe the girl committed suicide and starts her own investigation. However, she doesn't expect to discover many dark secrets within the school's walls... (Source: XuongPhim)