Responses

They do that in American comics, but don't seem to treat manga that way. The only case I've really heard of a series being "completed" after an author's death for manga is "Itazura na Kiss", when the author had told her husband enough of her intended ending that when the work was turned into an anime they used the information he had to finish it. Other than that, works just aren't picked up by others.
There's no way that how it ends.