
Finished the show. All I can say at first is… “oh wow”.
Continuing off from 11, the trauma has caused Takuma to revert to a child state, and he thinks of Hayami as his mother. With no options, Hayami leaves for Tokyo with Takuma to try and make him recover by going back to apartment where he used to live. They both live a happy life there for a while, until one day Takuma follows Hayami out to do grocery shopping.
On that fateful day, Hayami finally asks Takuma of what he really thought about his real mother, in front of a railway crossing, and the question stirs up painful memories. Takuma falls in to a trance, and suddenly realizes that Hayami isn’t hold his hand. Hayami tries to save a kid whose ball bounced in to the railway crossing, and Takuma realizes it was the same thing that happened on the day his mother died. He finally opens his eyes, only to see Hayami… getting run over by the train.
A recital of the “Footprints in the sand” by the main cast is read, and time jumps to years ahead. Hotaru is now the village elder, Maki and Hamaji got married and actually have a child and Yui is still Yui. Takuma is now a handsome tall guy (lulz), and his eyes are fine. He’s putting on the finishing touches on a huge windwill, built on the same hill he met with Hayami, when he hears a familiar voice. Loli-mode Otoha appears out of the bushes chased by a wild pig, a reenactment of sorts, and dives right in to Takuma, telling him that it was hard for her to persuade the Spirit World to do this.
Takuma is left wondering on the meaning of the words, when another familiar face walks out from the bushes. It’s Hayami-chan, miraculously back, and Takuma is dumbfounded for a moment before he smiles back to her, and the both of them look up on the newly completed windmill. The End.
Really a nice ending there, relatively speaking here though, considering how botched up most of the anime was. I’ll say it’s the most solid ending episode yet (until true tears 13 airs) of this season, packing a lot of closure in one episode, yet still managing to insert a lot of drama in to most of it. Truly, I didn’t expect Hayami to actually “die” in order to finally salvage back Hirose’s heart, and it was a rather shocking moment when it happened.
Looking back, it’s also pretty awesome how they manage to write out the last few moments and resurrect back Hayami from the dead… providing a touching closure to the series. I still accept it’s highly deus ex machina but still… it was nice of them to finally be together. Also, +awesome points for the hot adult Hotaru and I kinda lol’d at the idea of Hamaji being a father. I guess it’s more correct to call him “mother”, rather XD.

Adult Hotaru is kinda hawt.
Anyways, H2O has been a mess, but I think the ending kinda makes up for it. At the least I didn’t feel “Oh i so wasted my time watching this show, orz” at the end of it. Not exactly a show I can recommend, but if you’re really interested, it’s okay to watch, heh.