As the Rule of Funny goes, the limit of suspension of disbelief is directly proportional to the funniness.

And yes, it works just fine for the first half of the show or so. Unfortunately the behavior of the characters becomes increasingly dumb without being funnier. The FLs in particular start to overact heavily. And it doesn't help to have supporting characters behaving normally, in a jarring contrast to the leads.

I really struggled towards the end, kept watching mostly because of Lee Yoo Ri. If it wasn't for her I probably would have dropped the show.