Redundant and unnecessary.

I'll tell you why so serious

Although it has its amusing moments, in eneral the plot does not convince.

It’s sentimental, ridiculously long and only occasionally funny

The first hour of this comedy was alright, not all that memorable but was alright. I didn't laugh or even chuckle, but was amused few times then and there. Just about everything about this movie is plain downright ridiculous and doesn't make any sense. However you just have to go with it in order to be able to watch it without nitpicking everything. I give it credit for when this movie came out, but it's kinda outdated now and corny especially the last 30 minutes. The first hour is watchable, but the last 30 minutes or so just drags on and on. Ha Ji-won isn't a amazing actress in this, but she fit the role very well.4.2/10

First of all, I'd just like to say that I'm really offended at the comment by the previous user. 'i guess it's hard to expect Korea to keep putting out quality movie.' If you're going to write a review, at least use proper grammar and capitalise your i's. What do you mean it's hard for Korea to keep putting out quality movies? That's a very racist comment and it shouldn't be posted here.Onto the real review...this was a really disappointing movie. I had high expectations for it since it sounded liked a cool movie, but after I watched it, I felt like I wasted my time. The storyline is very bland, and it was probably just riding on the popularity of Kim Jae-Won and Ha Ji-Won at the time. The story jumps from one scene to the next, and before you realise it, BAM! The two lead characters are in love...(now, isn't that a surprise?) The worst part of it was the ending - it was lame and totally expected. You'll find yourself rolling your eyes by the end...the movie's full of clichés, and it's a waste of an hour.

I guess it's a tribute that everyone brings up "My Sassy Girl" as a sort of standard for this particular genre. If you haven't seen it yet, give it a go.As for 100 Days with Mr Arrogant it's a fair way to waste some time. Funny thing is the movie was better when they focused on the lowbrow, physical comedy at the start. The romantic resolution was a little forced and predictable--more formulaic than original. Originality is hard to come by nowadays anywhere, so I at least hope for good execution and nice production. The leads do look nice and the comedy and production were the strong points to me. Just a little diversionalong the way and no way near as magic as "My Sassy Girl"

Do you really expect much from Korean comedies? Does anyone watch them expecting a great and innovative film? NO. You know going in that 99% of them are very dumb, often with sick humor or unintelligible plots. How can you expect much more. With that in mind, this is one of the funniest, dumb, sick humored and unintelligible Korean romantic comedies I've seen. If you haven't been privileged enough to watch a Korean comedy yet, this may not be the place to start. The lead actress is annoying (and they usually are in these types of films), but you can't help but laugh sometimes. The supporting cast delivers some great laughs as well. If you are a fan of the genre then you will not be disappointed. If not, then you've stumbled on this web page by accident and you should run away VERY fast. You don't know what you're getting yourself into.