I have been watching Jdramas for some time and i know the drill fully, so i don't expect much.

This drama has a cute story. It is romantic. BUT, there is a big but here. It does not make sense at all. Like in real world, there won't be any nonfunctional couple like this drama's pair.
The FL is way too shallow, and the ML is lacking. Their relationship is weird. A simple sex is postponed a dozen times( yeah understandable because she is a virgin, but mannn she always falls asleep. If you are a workaholic and so sleep-deprived, better get your life together before wasting someone else's time.
The ML is lost. Like you like her because she is CUTE? ok she is. Then what? Start where we left off? Ok cool, then what?
Don't get me started on misunderstandings. They are solved like in a second :)))
The jealous second FL doesn't even make sense :))
If you have so much time to spare, watch it. Other than that, a big NO.