Speechless

I have just one important question “Why?” Where the friendship between In Ha and Tae Ho disappeared? out of nowhere In Ha is the bad guy? The most uninspired idea! What was the purpose of the FL? I don’t want to seem bad, but FL didn’t add any value to the series, worse, it lowered the potential.
And the ending? Why? I don’t get it. It was frustrating and hard to follow.
Initially I thought that it was the acting of FL the huge problem, but i found other things much more disturbing; which did not make watching this series more enjoyable.