This is a good drama, with a good plot and a good execution of the challenges of releasing an app in this ultracompetitive world, but after watching it I'm left asking myself if I've just watched a Hallmark Drama or not as the feels and the everything surrounding the FL story screams Hallmark....

The SL/SM story is completely ignorable, only picking up in the 2nd half...
And sadly, the FL Ex Boss/Hinted EX Boyfriend had so much potential, wasted in a smoothed out and... Hallmark, innocent conclusion, just like the Classmate that wanted to be more than just that...

The FL and ML acting and the story are good just as is the story, and the depiction of the growth of their relation does not feel forced and we can actually feel, at times that they were childhood friends with romantic feelings for one another.

In conclusion, this drama is not bad, and in one of those days you just want to pass the time it is absolutely rewatchable...