This drama is very short so there is no time to build the characters and adding much spices into the story. It keeps the simplicity of the story. I personally like it.
It was hard at the beginning bcs the age gap is too much between the father and the son, but the father can keep his cool throughout the story so it becomes easier to relate to him.
This story is fresh, if not brilliant. Each ep will start funny and light, then at the end, it teaches a lot about life and relationship, esp between family members.

Note : The ending ost is my new favourite