Btw, I like how we have now 4 stories with skeleton protagonist in "game" world but none of them are similar: Gaikotsu Kishi-sama is light-hearted and comedic; Overlord is dark (though, not serious dark); Nozomanu Fushi no Boukensha is epic (in the first sense: a guy going on an adventure full of hardships, the standard "good guy on a quest"); and this one (from what I see) is realistic: good guys don't always win but there is not too much despair.
Also, I find the 4 of them interesting (Though Overlord is less good, a bit disappointing. But he is still quite unique, I don't think there is another that ressembles it).