Blue Ocean Fantasia

The background is an imaginary world that took place in the 20th century. A man who lives somewhere in the ocean accidentally meets a girl who unfortunately fell into the ocean due to a cruise ship accident. After rescuing the girl by his own efforts, the man found that he was gradually falling in love with the girl, but he didn't know how many unknown difficulties he would encounter: on one side were the taboos between different races, and on the other side was a world full of changes...