The main issue of this drama is the acting. He's a robot and she's a cold board that sometimes uses a cute facial expression, but that's it.
The story says she's some kind of genius, but besides studying a lot and being good at a videogame, no proof of her intelligence has been found yet. I can't even describe the guy, he just stays there and looks good, being cool, cold-hearted or whatever.
Even their love story is awkward: they pass from online to offline dating without a reason...? I mean, c'mon. They barely spoke to each other during the first live encounter and for the majority of time was a monologue inside the girl's head. They said multiple times that what's matter is inside and not the beauty outside, still, they're together without really knowing each other? They spend the majority of their conversations talking about other people's matters.
Their relationship is based exactly on what? No idea, really.
The only characters that bring a little smile on the viewer are the three roommates of the guy.
For the rest, it was painful to watch.