Kun in the Distant Ocean

Both synopses revolve around young women who become involved with supernatural beings, specifically sea princes or gods, and are drawn into complex conspiracies and conflicts within their realms. Sacrifice, forbidden areas, and secrets play significant roles in both stories. Additionally, mistaken identities, love triangles, and the blurred lines between good and evil are common themes in both narratives.

Both FLs are humans who were born with heart defects and as a child magically absorbed a scale from the ML which healed them. Both MLs are supernatural beings looking for that scale.