I finished the drama and I'm left with the feeling of "what have I just watched?".

It's a simple storythat has a lof of fluffy moments. They cute and bring smile on your face. It can be treated as a "feel good drama". The cast is good looking and act well enough. The couple get together quite quickly, they hug and kiss A LOT. There's that intensivity that's usually absent in Cdramas.
That's for positive side.

For the negative.
Half of the screen time shows people striking billiard balls. Really. If it's not ML, it's FL, other players or even some random people at the club. The rules are never explained and as I know nothing about the sport I don't even know if the leads are winning or loosing. So there's no emotional build up during the scene. Sometimes a little is explained by a sport commentary. At the end I was skipping all billiard scenes.

Also, you have to switch of your brain to enjoy the drama. If you question a single thing everything will fall apart. For example, why other players want the best player to come back and make them loose their high ranks...
Honestly, I want to rant here about all the things that didn't make sense but I don't want to spoiler.

So, while I liked the intense romance part the rest was either skippable (the billiard) or boring.