This show was totally played for laughs, thankfully, but still... why couldn't they have made her just a few years older than him, but still in school? The low rating by me is pretty much due to this, it was uncomfortable for me to watch. That said, you should try it if...

1) You want somewhat over the top humor.
2) Don't mind overacting (purposeful in this case, I think)
3) Like the "fated to be" trope
4) You are in the mood for something light to watch, without angst
5) You don't like 2FL storyline. There is one, but it is resolved really well
6) You like to watch shows about friendships and the importance of friendships
7)You like some fantasy in your shows. I mean, she thinks she's in love with a manga character!
8) You like a cute ending.