Note: The title is meant to be ironic. This is not actually a tragedy; in fact, it's a comic morality tale.
This is a hentai version of a very old story: a woman sets out to meet and marry a rich man (in this case to capture his heart by sleeping with him), but instead finds that it's a poor man who she keeps coming back to.
It's an amusing story, if nothing else because the story is told from the perspective of her cynical-but-loyal pet dog. (And no, this isn't a bestiality manga, although she does meet a veterinarian at one point...)
The nudity and sex are pretty well drawn, if overly censored. Also everything is fairly tame: no rape, no bondage, no NTR, etc.
Really, it's a fun romantic comedy about a woman trying to sleep her way into money, who instead finds true love, and then must come to terms with those two impulses. It's short and sweet, remarkably drama free considering it all, and with a happy ending.