This was a lot of fun to watch. Yes the story makes no sense and it's cheesy to the point that it's embarrassing to watch at times, but I was properly entertained. I wanted to watch a romcom that doesn't frustrate me with it's triangle shenanigans and this one really delivered.
However even if I ignore the overused prosopagnosia plot, the entire secret secretary organisation feels super stupid. Luckily they quickly shifted the focus away from them (unlike in Strongest Deliveryman.), so I wasn't annoyed too much. If you like sweetness & borderline embarrassing humor you will certainly like this show. Over the course of the 16(32?) episodes nothing too frustrating or unexpected happened, not even the chaebol family issues were pronounced. The pacing could have been a bit better, he found out her secret identity like 2 episodes too late, not that it's that big of a problem, since I think we've gotten enough fluff before the closing credits anyway.

This was airing at the same time with Abyss, this one is like 32278347823432423 times better.