I don't have much to say when compare to the Webtoon cause they changes almost everything. The Characters are different, they dumb down the male lead, they make the female lead silly beyond belief and the supporting act character feels like stolen from another drama.

For the drama, they added every cliche from other romcom drama, she was pretty, secretary kim, my secret life of secretary is all in here. I almost thought they wrote it to cast Park Seo Joon.
The last part is not as good as the beginning, probably they run out plot, male lead can't act to save the lines.
I probably rate it higher had the male lead can actually act but Ahn Hyeo Seob has been bad, Kim Se Jeong is the lifeline in the this drama.
I think it's right in the middle as a drama. As an adaptation, I rate it minus.