So this is an anime series of a visual novel where a robot girl is found during one of many deep salvage dives. There's less sci-fi and more cute characters being cute. There were also several outstanding piano pieces in the soundtrack, "The Sunken City" and "Vertigo", although I'm not sure whether they were featured in the anime. The plot generally focuses around light things like restoring a school and restoring other places and things, although they do make a plot-inducing discovery later on. Did I mention that the little girl is really cute? If you're watching this show for the cute interactions then your heart is probably inthe right place!