I put off reading this one for so long because of the yaoi tag, what a mistake that was! This story was simply beautiful. It started off a little rushed I felt, I almost dropped it because I hate the whole "love at first sight" idea. Their relationship escalated so quickly, and Kain was the worst boyfriend, but their arguments always seemed to be over in an instant, I felt it was a little unrealstic.
Don't get me wrong, some people, especially those with abandonment issues like Mel, would be so forgiving, so it wasn't that they were out of character, but more that the problem would appear, blow-up, and be resolved within a few short pages. It made it hard to connect with the characters. Stick with it though, because it gets better, much better.
The main reason I love this manga so much is that it deals with actual serious problems, such as AIDs, homophobia, the struggle to come-out, child abuse, and the dangers of police work in a realistic way. This isn't your typically happy yaoi world where everyone is either gay or supports gays (except the evil woman who tries to split apart the main couple), this isn't a world where people fall in love with rapists or bounce back from a traumatic ordeal just because they were told "I love you".
In short, its realism is what makes it so damn good and you end up falling in love with Kain and Mel yourselves. I especially like the epilogue, but I must warn you not to read it in a public place. I don't usually cry at manga, but the epilogue of this had tears streaming down my face. It was a perfect ending.
This review is kind of all over the place, sorry. It's 4am, so I can't think straight. I'll edit it when I'm more awake. All you really need to know is that this is a must-read. Point were detracted for the speedy start. I think this manga would have benefitted from an extra volume to build up the relationship a bit more.