This is basically the story of a boy who becomes a spirit that lives in mirrors. Though with severe limitations based around a cursed item. All of which is tied to love, the item's curse was for a lover, he's in the situation because of his love, the girl he loves is trying to save ect.
You know all those sayings about how do you judge a person's true worth ect. This manga is kinda like that. It's likeable but it also does some standard things, but it's well done.
I'm still totally recommending it. You can break this manga down to two components. The romance which is a mix of something like Kimagure Orange road, video girl Ai, gatcha gatcha ect, and the mystery of the curse.
The curse is the road that the romance goes through. It's completely integral to the story but it's just the vehicle. You can break it down to 40/60, with the 40 being the story being about a cursed item. But you'll enjoy this vastly more if you like shounen romances, especially the ones before 2000. The hero is really normal but not weak, or into anime ect.
The girls are beautiful, and the art reminds me of Ichigo 100%. The main two fit a certain type but they're also normal. There are other pretty girls around but they're just friends(all the girls are a group of friends). There's no game type of inspiration. The closest you get is that one is scared of the supernatural after getting freaked out, and the other is more scientific and delivers a good skeleton's have no muscles joke about spirits(I liked her other point too).
I imagine it was hard to come up with plots to this story. This doesn't become a story about schooldays, and mostly focuses on moving the plot forward. He made the story short, that seems like a conscious decision to me.
I think this manga has charm. It's refreshing because not too many are done like this, even though some aspects are standard.