I'm reading the manga and I like it. Love that the protagonist is dating both twins instead of being indecisive or having one of them just acting as a wingman (or even worse, a siscon antagonist). Would be fine reading the novel.
The title of this post has me wanting this series. I really want more female leads, especially in non-traditional roles. Even better if they are not being saved all the time. This may not be a strong fighter type female lead, but better than all the male crap that's out there.