Haruka

You may think that Poseidon/Neptune had 2 demigod children, but what happens when there was another child of the water god.
Haruka Nanase age 17 is currently attending at Iwatobi High, living a somewhat normal life or if you can call it normal. Haruka may appear human but he is actually half mermaid and half god. His mother is a mermaid and his father is a god, to be specific a Greek God. When he and his friend Makoto were off doing swimming practice a strange monster came in trying to kill them. His best friend Makoto Tachibana try to save his friend and in the process the 2 discovered their true origins.
I own nothing this is a fanfiction.