OBA-323 Chizuru Murasaki, my beloved Chizuru teacher, reunited after a long time

Chizuru leaves her job as a teacher and becomes a married woman, and Iseshima graduates from school and works at a security company. - Even though the two had a relationship of teacher and student, they made a one-time mistake. - A few years later, Chizuru moved next door to Ise Island and they met again by chance. - Although they hide their upset, their past memories come back to them and they begin to recognize each other as the opposite sex. - The relationship that used to be that of ``teacher and student'' has once again become a forbidden relationship as ``a married woman and a young man.''