There is no ending, the manga stops at about volume 3 of the novel, apparently most of the story is novel 1 and pulls in parts from 2 and 3 so things are out of order
There is potentially a good ending in the novel but wait for it... the novel is not finished translating, though it is finished. it seems to be 1 chapter every 2 months, but this is something where you get a substantial length of reading, volume t had seemingly 9 chapters rather then some light novels being 30-50