Nise Seijo‘s conclusion turned out to be a total disappointment, coming across much like a ‘what if?’ fanfic. The Off to Japan segment in particular is just beyond baffling due to its massive food focus. Was the author just bottling up their desire to write a travelogue this whole time?
Basically, unless you’re absolutely desperate for a contrived happy ending, stick with treating the third novel as the series’ finale.
The second Ryoumin 0-nin Start novel meanwhile is much like the first, which I suppose shouldn’t be surprising since according to the Afterword it’s essentially the second half of the story’s prologue. At the moment I’m cautiously optimistic for future developments, but the indications of potential future romantic tensions do not bode well.