Actually, much more fun than I expected. Not "must read", but solid 7.5/10.
With a bunch of needless flashbacks, adventures during the wagon travel completely irrelevant to the plot, or a few years long ship travel would probably reach 9+, but w/e.
Also I have a theory about the "isekai" part: it's actually every other character who got isekaied into this setting from a bunch of different manga/anime and we are yet to learn their true names, while Rin-kun is 100% native.
Btw not enough fanservice. How could you even make a manga with "maid" in the title without a lot of pantsushots and huge boobs? I'm completely baffled. And where is proper harem? That one girl is barely jealous of that another girl, and suddenly they even look like bffs! And other girls are not even interested in that dude!
Totally would not recommend if you are into proper isekai with boobs and harem and stuff *shakes head*