Okay, if you really want to watch this, you need only one thing: A HIGH LEVEL OF PATIENCE.
Basically, this drama tells you about 2 different couples:
1. the university couple - the hardheaded tomboy x a guy from her all-guy friendship circle.
2. the other couple - a naive girl x her sister's ex

The characters are so friggin stupid that it gets frustrating 90% of the time. However, characters aside, I always love a cute love story, and this drama definitely has some cute fluffy elements in it (despite the unbelievely SLOW progress of the romances). This is why I gave the story a 7/10.

I don't see much problem in their acting whatsoever, but sometimes the emotions weren't really conveyed properly so it was kind of awkward to watch. But I love how they casted it since they had Mek and Mild paired again like in Ugly Duckling series: Don't. And I love their chemistry. Hence, an 8/10.
Fun fact: Mook and Mek are siblings.