As another stated, its best to check your pride at the door. I found it hard to put myself in the protagonists' shoes and be able to relate to what the character was feeling, but being the tard I am, that did not prevent me from getting into the story. I was able to put myself into the protagonist's shoes, but I almost prefer that I hadn't. Situating myself in this manga led to a great deal of introspection on my part, about myself and human nature, and you may discover some rather unpleasant things about yourself. If you're prone to jealousy (like me, as I discovered), this is an especially painful read, particularly in volume 4.
The two main characters' sadomasochistic relationship can be rather disturbing if you have an aversion to it, but the development of the two main characters' relationship is the driving force behind this series. There are also a fair amount of lulz, to boot.
I'm giving this a seven because there wasn't a whole lot of content in the first two volumes that I deemed worth reading; most of the character development occurs, rather rapidly, in volumes three and four. Although I found myself intrigued by the two main characters in this drama, I never started to 'like' them or appreciate them at all. The comedic moments were few and rather bland imo. I did not find myself LOL'ing at all, unlike other series I have read, but I'm sure some of you will appreciate the humor. Also, I did not appreciate the mangaka's style of artwork, but I'm sure many of you will disagree. Please note, that this is not at all an objective review.
I'd best describe this as an 'addictive' read. Much like any suspense novel, it keeps you 'on the edge' (hehehe), and continuously raises the 5 journalistic questions of: who? what? why? when? how? It may be painful and frustrating, much like a drug (see: tobacco) but you'll want to come back for more. Granted, if you want immediate satisfaction of any kind, or are looking for lulz...look elsewhere.