The starting of the drama is great. I mean it has the right amount of all the emotions. You will enjoy the comedy and heartfelt moments in the start. Then after 5th episode it becomes really silly. The story goes well but there are many unnecessary complications or delays in it.
The male lead actor did a very good job. You will love him. He is very young(22yr) but his acting skills are really good.
As for the main actress, Go ara, I never was a fan of her. Never liked her acting. Here the role suits her because the character she plays is a silly one. But I still think her acting is not that good.

The Ending was really bad and not at all satisfying. The problem with the age gap here was that the ML was a minor so it felt weird to me to watch them have romance together.

Overall this was a cute silly drama and you may like it if you don't mind all the things I wrote above.