Newly appointed female teacher Reiko Takayama (Jun Kusanagi) is assigned as homeroom teacher for a class, replacing a previous teacher on maternity leave. Among her students is a troubled boy, Kazuya Yokota, who carries deep personal issues, and Reiko becomes intensely invested in helping him, desperately striving to set him on the right path. However, her dedication draws jealousy from male teachers and students alike, who conspire to drive her out of the school. One day, a threatening remark is thrown at her: "Didn't the male student you got involved with at your previous school commit suicide?" With that single sentence, Reiko is branded as a "sexually deviant teacher," and her fate takes a drastic turn. Despite the mounting pressure, she remains true to her beliefs and continues to deepen her connection with the troubled student. The story unfolds through her emotions, struggles, and unwavering determination.