Season 1 (episodes 1-13) focuses on the lives of four childhood friends who are forced to leave their underwater middle school and join the middle school on land.
The group of underwater kids experience many changes/challenges like learning to accept those that are different, learning to put others before themselves, love and that change is inevitable.
Warning! This is an emotional anime. It has some sad times and some overwhelming times of happiness too. I lost count on how many times my eyes refused to obey me and I had to feign allergies. ;)
Although the anime mostly focuses on two of the four kids, the other characters are just as important to the overall arc. My favourite character was one that didn't get much air time, Uroko-sama, the Sea God's messenger. And can you blame me?
You can watch this anime online at the following websites:
Episodes 14-26 are currently airing every Thursday at 8AM PST.