Zai Du Yu Ni

Two persons who missed their chance to be together in high school because of some misunderstandings return to teach at their old school after graduating from university. After seven years, however, the male lead doesn't realize that the female teacher standing before his eyes is the girl from back then! The two-faced male maths teacher and the stern female gym teacher meet again. Even though some things may stay the same, the people themselves have changed. Can the feelings that died back then return once more? The secrets from their senior year of high school are slowly revealed... Source: MU