This is a family based drama series, who ask you as a viewer what it takes to be a parent? How to forgive and how to let go? And where is that line that you have to say enough!
Being old doesn't necessarily means you are a grown up. To me, this series is about growing up and become a responsible adult. And the circumstances and people who accompany you in the that road.
I was intrigued by the plot of 'Oh! My Girl!' so I decided to watch it. It's a classical family-drama. Though the story is kind of slow, some of the character are really hateful. Fuji Mineko, the manager, does literally nothing but complain. She can't even do her job, but can always put the blame on Koutaro, she does not have a purpose. Ann, on the other way is still a little kid, but she's such a spoiled selfish brat when she's not in the right mood. All in all, it seems like Koutaro is the only normal one, trying to juggle everything on his own (even though right at the start he was really insensitive, but he redeems himself later on).
I would recomend this drama if you have time to kill, otherwise don't bother, it has really cute moments and the actors are good, but it's nothing special.