Even though I'm an old man, I love manga. I love it because it gives me a way of escaping the tropes of American media. I grew up with them and so am old enough to be sick to death of them. And I love manga because many of its stories give me a chance to relive my youth.
On the other hand, I regret that, though I understand that manga is widely read in Japan by all age groups, seinen and what I would call "seinen+" manga are seldom translated into English. I've heard that one reason for that is the fact that manga for grown-ups uses a lot more kanji than manga aimed at younger people, and so it's hard to find translators for it. Another reason would of course be that the community of manga readers and translators is mainly young.
DoLL is, then, that very rare thing -- a "seinen+" manga. I call it that because if you average the apparent ages of the two main characters, you get about 45. If that seems unattractive, I should mention that it's funny as hell, and pretty sexy as well.
Here we have a man and a woman who are working at cross-purposes in almost every moment of their interaction. One of them is old enough to know that, but won't say it for reasons of his own, and the other hasn't reached a point to life to have a clue as to the fundamental nature of the conflict. Watch them go at it!
And the greatest thing of all about this manga -- the thing I love the most -- is that their struggle reveals the fact that they have the tightest connection possible between their two hearts all along.