Ohitorisama (2009)

Everything(to the plot to the characters)is same except the main actress is a teacher and the main actor is Koike Teppei.

Both have similar story about younger guy and an older woman who are working on the same workplace.

Established career women fall for new employees. Both FL are in their th Tried, male leads are interns or similar. Ohitorisama is based in teaching/education.

A somewhat younger guy and older women pretty much the same plot.

Both are about a older woman established in her career finding a much younger man with little prospects. In both the women take the relationship for granted and ultimately find out that no matter what others say, they will be with these younger guys in their own way

Both dramas are about the life and struggles of a single teacher in her 30s and how the arrival of a younger man in the school changes the life of her and people around them.