Such big names cannot make this script work.

First ep. was so enjoyable. The over the top comedy of Seo In Guk and his team operating cafe Minamdang got me laughing non stop.
Then came in the FL's grand entrance, taking down a van of bad guys, walking in slow motion with wind blowing up her hair on one side. WOW! SO Good I thought!

And then.....
FL went from super smart to can't connect the dots.
Somehow FL met ML are supposed to be at least a decade apart yet ML didn't age after so many years . Meanwhile she looks older than him. When casting doesn't match the characters, it's hard to make it believable.
FL & ML -- Zero chemistry. I enjoyed these actors in other dramas but this pairing was just terrible.
The last "twist" was not necessary.
Again same age characters as children (school age boys) ending up looking 10-15 years apart.

I finally finished it but definitely time wasted.