
This comment cleared up the fuzzy feeling I got from reading the other comments.
I only read through Vol.1 and didn't really enjoy reading it, but I still got the impression that Momo became that way to unconsciously protect himself from reality that hurt him too much. It's sad and disturbing to see him that way, but I still feel like I want to give him a hug and give him lots of love. I wonder if I should force myself through Vol2 or not.

You are thinking exactly like the Yata-character in the manga. Give him lots of love is what he does, and in the end, it's working. Somebody who's never been respected nor loved tends to think there's no such thing for him: that the disrespect and abuse he's getting is actually all he's worth. How's he to know anything else? So, in the beginning, he accepts what he thinks is normal. In the end, he knows what it is to be treated like a real human being; he finds out when he realizes that's what Yata's giving him. It takes him a while to understand it, since it's the very first time he experiences it.
That's what the mangaka's point, I suppose. I would have done it in a more dynamic way, I guess: but the character of Momo is quite real, I swear. In every big town there are kids like that, growing up without the smallest bit of respect, prostituting themselves or begging, 'cause that's the only way they know how to survive. It takes a lot of selfrespect-boosting to make such a poor thing start feeling like a real human, with rights and value. I guess in Japan, in spite of the good status of children, it must happen too. Or else the mangaka has taken the example of a kid somewhere in Thailand, Birma, Africa or anywhere else where kids are left to fence for themselves like little stray puppies, with nobody caring for them wheter they live or die... Anyway, being a sentimental Japanese mangaka, she's turned it into a yaoi love story and gave it the "Love conquers all"- theme.
I don't like the uke at all...he is one of the worst ukes everrrrr! Couldn't finish it!...I want a Seme like Yata. Screw me silly and make t hust so that I can't even walk. ლ(´ڡ`ლ) Momo rather have cheap sex and get beat I guess?