Quite the yuri, this one.
Most readers will most likely be put off by the fact, that the girl in question is 9 years old.
However, not only does this story convey that and cement it, but it also establishes that our Maid in question is going to wait.
With all the (very well done) comedy out of the way, this story has alot of well thought out messages to convey, and a genuine love between two characters that must wait another 9 years in the oven.
Even other side characters are well thought-out, not only for the comedy aspect, but also for the serious parts.
I think this is a very underrated and partially missinterpreted manga, and actually really well done, in both art and writing.
Full recommendation from me, if you don't mind it's 'sus' nature.