Fish Knows You (2023)

Although not the same language but similar stories exept the male us richer one in legend of the blue sea and the female is the mermaid

My love from the ocean has similar stories exept that in My love from the ocean the female is a mermaid not the male

The female Lead is an Alien came from another planet that has fallen in Love with a male on Earth My girlfriend is an alien shares a similar concept to Fish Knows you as both of them are about Aliens from other planet.

Both male leads are merman and they fall in love with the girls who save them Both drama have similar story line expect for childhood story