Mermaid's Cradle

Ael, a mermaid with a kind and upright personality, meets the lost mermaid Ort one day while swimming in the sea and takes him in. The young Ort grew up well under Ael's care, but his obsession with Ael became so strong that he continued to hover around Ael even after becoming an adult... Unable to stand by any longer, Ael tries to persuade Ort to become independent, but Ort is furious that Ael, whom he thought of as his companion, is trying to send him far away. In the end, Ort makes Ael feel firsthand how precious he is to him... Ael is gradually losing his body and mind to Ort, who was like a son and younger brother to him, and Ort does not want to let him go. What will be the end of their relationship?

(Source: Bomtoon, translated)