The Starry Night, the Starry Sea (2017)

Human female falls in love with a merman king who has limited time to live as a human. Unusual circumstances lead to cohabitation, a strong bond, and friendship between them.

The same story about a human girl and a merman who fall in love, with the same actors but one is set in modern times and the sequel will be set in the past.

Both male lead are god from sea/water in human realms their trusted servant live from generations both male lead comes human world to find out precious thing and encounter female lead for whom they fall in love as times goes both male lead found some how female lead life at stake on consequence of male lead mission

Note : "starry night starry sea" is better one

Both dramas are about a mermaid/merman and human falling in love.

Both dramas feature love between humans and non-humans who had been living for centuries, waiting for their loved ones to re-appear.

Feng shao feng is totally in this one. He is the best . This drama , he play the kind heart and long for freedom ice prince ( kasou)'

- Romance and comedy <3
- Love between humans and mermaids
- mermaids live in modern days
- lovable dramas

In both dramas, the male leads have supernatural powers. Both have a similar theme of male lead being away/asleep for 100 something years. After awakening, they must re-enter society and learn the ways of the new world as well as find the person that harmed them.

- both having a ML being a male mermaid in high status.
- both FL are human. In both the male stays in the FL home.
- in both ML is really thirsty for water in abnormal way, in both the moment he touch the water he grows his tail
- the TSNTSS has more romance, and is longer.