I think both Woojin and Chanhee are awesome characters and partners. The only reason why the girl didn't do well with Chanhee was because in a relationship one of the partners has to be more open and outspoken, more goofy, the person who isn't as proud and would not hesitate to call. She was very hesitant and shy and introvert and Chanhee was also like this , that's why there was a lot of miscommunication. Where as Woojin complimented her personality perfectly as being kinda opposite to her traits. Chanhee found himself that red-haired glasses friend who complimented his personality perfectly so I loved this realistic approach. Me, as a total introvert needs a pushy extrovert to pull me out of my awkwardness.
I can't believe more people haven't read this one. It was a simple story that turned so beautifully complicated. Literally some chapters even made me cry. I know there were side-stories which will be continued or not. This is the first time I'm saying that a webcomic is so perfect I don't even care if this is the bittersweet end. It is that perfect.