Since it was serialized in "Manga Erotics F", I expected to see something naughty but the closest this manga ever came to that was just an implied sex scene. This doesn't affect my evaluation of it in any way (OF COURSE), but I thought I should just mention that, for the benefit of any *cough* pervs *cough* out there.
The plot and characters are fairly simple, and the main draw for me was the art--it too is simple, but effective, and reminds me a little of Quentin Blake's sketchy, raw style in those old Roald Dahl books you used to read as a child (you know who/what I'm talking about right?), except with slightly tighter lines. Unlike a lot of self-taught mangaka out there, Natsume Ono can draw--she probably went to art school or something. I mean, just look at how she does the bear; it's not hyper-realistic or anything, but at least it's unmistakably bear-ish-esque...which is more than I can say for most of us, when trying to draw the same (go ahead and try it yourself--and NO, teddy bears DON'T count.)
There isn't much dialogue, which is how I think a comic should ideally be done -- let the pictures tell the story, otherwise we might as well read a book amiright? NIGERU OTOKO does a fairly decent job of that.
Bottom-line: it's an okay read, something mildly pleasant with which to pass the time.
