I think this drama was dropped ._. since Yoo Ah In has been offered a role in a historical drama and if MDL is correct this should air in may but we don't even have cast yet...so sadly i don't think this drama is happening :/
It's been a while since i've seen the drama but if i remember correctly the main guy is suffering from social anxiety, so he can't really talk in front of people etc. So this drama is kind of like "see him deal with it" and slowly make the anxiety disappear as his self esteem gets better. It's not suepr dark but it's not all goofy and cute as you'd think when you see "comedy".
This drama would've been perfection if it wasn't for the tiny dragging ending (just my opinion) but as i'm a hardcore fan of this drama i still gave it a 9.5 xD