Haven't you ever heard of "love at first site" ; it seems to happen a lot in romance stories though in this case her special ability may have something to do with it. It could go any way it wants in this manga.
Yeah, I myself experienced love at the first sign too, and I can tell you that it's an unconditional love and it comes to you like a lightning for no reason at all. But in this manga, the author told us a very long story upon the hero's special context and then the maid appeared and made him fall in love for a reason that I found quite irrelevant to the preceding context , thus I think his love quite unconvincing to me ╮(￣▽￣)╭
More over there is no chemistry between the hero and the maid so I still can't believe he fell for her for real ┑(￣Д ￣)┍.
Hope that it will develop more in the next chapters
After super long back story which helps explaining the hero's tragedy, i still found his love being triggered by a random maid too spontaneous and unnatural ┗( T﹏T )┛