【The Devil's Script】'Beast of the Sea'

Humans are born from the sea and return to the sea. A story of "humanity" swallowed by the ocean in the distant future. A creature devolved from males, the Sea Man (Mailmere)... they have legs but have lost their arms. A creature devolved from females, the Sea Beast (Merbett)... they have arms but their legs have transformed into tail fins. Two species that can interbreed with each other yet are natural enemies. Though, both species undergo sex changes within their own kind and have no trouble reproducing. A young Mailmere falls in love with a young Merbett girl who saves him from a trap... but sadly, the two are completely different "creatures."