Firstly, I would recommend this manga to anyone who is fan of Dan Brown's Angel and Devil, Da Vinci Code and The Lost Symbol. This manga is a great combination of religious knowledge from the Bible and Demonology, very informative and pretty accurate (considering some improvises which are not too annoying, for example the utilization of the term "nephilim"). The source and stand point of knowledge was also consistent, which pleases me deeply, considering that the theme that the manga treated has a considerable variation depending on the religion and belief (for example, the seven archangels are not the same in Christianity and Judaism, the manga probably exploit the Bible from the Judaism stand point).
Furthermore, I also admire the philosophy emphasized in the manga. There is neither good or bad, things are just different from each others. Devils are not necessary bad and Angels are not all good either. I find it interesting the way the author describe Lucifer, king of the demon, as a well loved lord, calm, silent and gentle (up until now, that is the feeling I get), while Michael the archangel is described as an ambitious and violent brat. In the Old Testament, Lucifer actually fell out of grace due to his greed for power and arrogance, while Michael is the image of Light and Justice (which is still the same in the manga, but interpreted differently).
The manga reached a good point when it stated Angels/Heaven tried to control people by punishment, and Demons/ Hell by Desire. However, I am not really satisfied with the way the author swing this point. Certainly, Desire is the source of sinful actions, and fear of punishment is just a factor that influence the decision making of humans, so you can say that rather than try to give punishment to things that are already done, isn't it more efficient to eradicate the source of sin, which is desires.
The author tried to make the point that Heaven cannot control humans for centuries because the fear of punishment cannot stop humans from reaching out to their desires, because it makes them feel joys in their short lives, so punishments are not necessary. I believe that the resolve depends on what the person really want in his/her life. If what s/he wants is joys then of course, following what your heart truly desires is the way. But if s/he wants the peace in mind then following the conscience is the way. I hope that the author can turn this point around later, so I would not have to feel bad for Uriel, that might be the most well developed character in this lineup.
Or, the solution can be "how about stop pushing humans around for a change?". People are humans because they have the right to choose how to lead their lives. Angels and Demons, as they despite and look down on humans race so much, are still desperately trying to control that small world. Why don't they just mind their business and leave humans alone? I think the author would like to make that point when she made William a super/ to the bone realist.
I would like to give compliments to the scanlation, also, for always, diligently, taking note and explaining the characters and their origins, their story.
On the other hand, apart from being a super informative manga, the plot and characters developing is not satisfying. The main character, despite his strong entrance and interesting image at the start, is fading away in this spiral of events. His resolve is weak, he found it, but too late, too slow and barely no improvement. I do not care about whether he denies or accepts the existence of supernatural beings or not, I just care about how he is going to back up that choice. And seriously, every of his choices, if he ever had one, has no solid ground at all. Meanwhile, he is letting himself being turned around in this turbulent, and even though he is stated to be very composed, in his situation, he showed to be powerless, useless and has no control over his actions. In the end, he would just wait for someone to rescue him. I think it is just me expecting too much from him and got disappointed.
Other characters' development is also disappointing. I think they all started out good, and then suddenly, the author just leave them there, halfway, to jump into another venture. The plot development is also too slow, while there are too much events jumping in fast. But these events, instead of pushing the plot forward, are making it confusing and hard to piece together.
This comment is updated at Chapter 36, so I expect things to change after. I would want the pace to be faster, but I don't mind having a manga with a lot of cliffhangers and finish beautifully, that would even please me more. But the way it is now, the cliffhangers are not thrilling enough to me. I will come back and make an update when things change.