The art is beautiful. The lines are a bit rough here and there, but I think that's what made the art appealing in some sense. It's not the most clean art around. But it can be real detailed sometimes.
Some people may not like the fact that this manga feminizes the male body a bit, but I think it's beautiful. Not weirdly, but definitely made the body more..flexible and sensual. ...which makes sense since this is supposedly a slash manga. so naturally, it would show off the male body in the same way that female body is shown in, say, ecchi, hentai, and shoujo ai....although i just noticed that it's not labeled as a yaoi or shonen ai genre--but it's listed in the category that it's a "slash."
It uses a peculiar combination of historical and seemingly modern equipments (or...not really..? like, having all the equipments strapped to the body and such--complicated contraptions. don't know how to explain it). Curiously, there are some European elements in the art as well.
The plot in general is a bi iffy for me so far. I'm not sure what to make of it since there aren't a lot of chapters out just yet. Not a lot to conclude from. The actions so far, though, seem to be coming out in arcs (episodic). It reminds me of a detective story, but with a hint of the supernatural (unknown setting, unknown time).
The characters are very intriguing. Even the side characters are well developed with good background story.
There are some humor in it, too. Some are quite funny.
The fighting scenes are great. Very aesthetically pleasing despite the rough drawing. All the acrobatics are amazingly drawn. To be honest, sometimes it's very sexualized-- there are no mentionable romance thus far, but, you know how fight scenes can sometimes be made to resemble sex scenes (or at least romance undertone)? It's like that. ("by gods, does he have to open his legs so wide?" and "why are they so close to each other?!")
If you are looking for an instant romance, you will be disappointed. This will be a slow build up one. Possible a "friend to lover" cliche. Not sure.
And yes, if there is to be a romance, it will be yaoi. I can see it coming (I'm just trying to convince myself here). The possible pairing is probably the most crucial reason as to why I'm following this manga.
then again, there's no way of telling it, is there? there are plenty of manga out there that has sexual undertones that ended up having no real romance in it, leaving that department to the readers' imagination (focus more on something non-romantic).
Hope this help!
Happy reading!