Married female teacher and student's father

Keiko, who married her husband who is the president of the board in a political marriage, works as a teacher at a school where her husband is an eye-catcher. One day, a transfer student, Mutsuo, comes to Keiko's class. Keiko protects Mutsuo, who is immediately noticed by a delinquent student. Then Mutsuo hugged Keiko... When Keiko is kissed by Mutsuo, she realizes that he is the son of Hanaoka, whom she loved in the past. A few days later, Keiko meets Hanaoka again for career counseling. However, when her husband finds out about their reunion, he proposes that Mutsuo be expelled from school...