Here is a short, small slice of an android girl's life, and a meditation on "mono no aware" or the wistful transience of all things. Little happens, and yet I couldn't help but smile at nearly every scene; there is no fear of silence or rush to an action sequence, instead confidently zooming into the ambient details like grass swaying in a sunset breeze or the relaxing burble of a coffee kettle.
Zoom back out, and we're offered a glimpse at the future days of humanity's lost past - life after the death of modern civilization, in all its splendid tranquility, from the naively inquisitive and adventurous perspective of that android girl who's more charmingly human in an hour-long OVA than most characters are over the course of a full series.
Yokohama Kaidashi Kikou is all it needs to be, and no more. Come to it with a quiet heart seeking joy and not a critical eye expecting excitement, and you may find a modest yet memorable treasure.