So, I'm really enjoying this. (Yes, I'm reading a scan of it. It's never been translated officially to English from what I understand)
I like the initial concept of them never being able to let go of each other. It's a neat little concept and it's nice that it's managing to play out without going into squicky territory thus far. I like the mysterious plague and the idea of the Sisters who can cure it.
Kiri being more than mostly ordinary I like less. I would've preferred both to be more ordinary and less unique snowflakes. It's less believable this way. Yet, his abilities as shown so far are interesting.
One more complaint I have is the amount of worldbuilding spread out (and yet dumped) throughout the first five chapters. It's a little much. See above re: unique snowflake - perhaps I would believe all that better if the worldbuilding was better-done.
But I like it. The character dynamics are good. They're fun and memorable. I like it.
**This review is for the entire series (finished or unfinished). I started only adding the first volume from manga titles because, well, do you realize just how many volumes of One Piece there are?!**
I was saddened to discover that this manga didn't make it very far because the idea behind Double Arts is really cool. The worldbuilding is superb; I was sucked in immediately and never jerked out. The disease's origin, effect, and 'cure' was so creative it surprised me...and the villains are fascinating. *sigh*
Even though it's very short, DA is well worth reading. I wish it hadn't been discontinued.