Oh boy. I thought I would enjoy this a lot more. The premise was so up my alley; age gap, he's her bodyguard and a gangster... What could possibly go wrong, right? Well, it's more or less your regular high school shoujo. Like he's older, but you'd never guess because not only he goes to school with her, but he's involved in the school stuff too, and also acts like a high school boy.
Towards the last few chapters that have been translated, it seems like some gangster plot is building up, which is the only reason I gave it a 6, but otherwise, it has nothing that makes it stand out. Also, the art is beautiful, so I guess props are due for that.
Give it a try, but keep in mind you won't see anything new if, like me, you've read many shoujo already.