The art is garbage. The characters aren't believable or interesting in the slightest. There's no sense of consequence to anybody's actions and no sense of struggle since victory comes too easily to Allen. The story is so detached from reality that it's impossible to take it seriously. With scenes like a helicopter punching another helicopter, one would think that this is almost intended to be a gag manga, but it's humorous scenes are few and far between so it fails to be a good comedy. It is over the top and could have been intended to be a parody of romance stories, but whatever the motivation it ends up as a bad manga. No, the author was probably just looking for a platform for blatant sexuality, but even its sex scenes aren't well put together--they have no sense of sequence. And the idea of an attractive man taking charge and conquering a woman is only appealing when the attractive man is drawn to look...attractive. But like I mentioned before, the art is garbage.
Chapters 3, 4, 8, and 12 are all completely unrelated side stories, but these stories are also not worth reading.