This is basically the most Slice of Life you could get really, this is just a chill read, don't expect too much confrontation nor the usual story writing progressions.
People who scream for plot should just find another manga that suits their tastes, it didn't really start with the aspect of having some form of objective nor conflict so there's no need to dramatize anything, the concept is already in the title itself.
There's no real purpose aside from territory/population expansion and slice of life, don't go looking for things that never existed, it's those type of read.