'Falling for Innocence' is typically the kind of drama that quickly starts as 'not bad' and end up quite enjoyable overall, even if far from perfection. While the story is not exactly the strong point of the drama, that's still a story worth following, considering the surprises to the viewers along the way. There's some kind of mix between clichés and 'not so clichés' scenes and situations there, that will keep up the greed and desire of the audience to the last episode. So that's already some kind of success for any drama, isn't it ?
One thing to notice, as minor as it is, is that the female lead being a little older than the male main role seems to bring something a bit refreshing and challenging. As if the others characters around her have to keep up with her, doing their very best to stay on her path. I really liked it, although I'm not entirely sure as to why exactly.  
And since the drama is done without too much technical issues (here and there, for example, forgiving a mic that comes into camera view for a few milliseconds ^^), that was quite an enjoyable show.
Then, this drama is an easy recommandation, especially if you're not expecting too much from it and if you miss the thrills of some other popular drama you've just finished before.
I think you will spend some good time, and if that's all you're wishing for, 'Falling for Innocence' could be the right thing to fall for.