Lover Merman

Twenty-eight-year-old Phu Phurit moves from Bangkok to an island in order to look after a sea-themed bar, Full and a Half, with his close friend Phana. Orphaned from the age of twenty-five, merman Nawa is an easy-going bartender at Full and a Half.

(Source: MyDramaList)

~~ Adapted from the web novel "Phiang Nawa Lover Merman" (เพียงนาวา) by Guy Suwannaroj (กาย สุวรรณโรจน์) and Lita P.