Translating Codename Anastasia Q&A (Idk Korean so I'm using Google translation) You can read the novel in Ridibooks by BoySeason

In the ancient oceanic kingdom of Thalassia, the Sea God Dylan falls deeply in love with Marlia, a mortal woman with a mysterious connection to the sea. Transforming her into a mermaid, they share a timeless love beneath the waves. But when a jealous curse tears Marlia away, Dylan embarks on an endless search for his lost bride. His tears, turned to pearls by his sorrow, are scattered across the ocean, a testament to a love that refuses to fade. Will the power of true love reunite them, or will Marlia remain lost in the depths forever? Ocean's Love is a spellbinding romance where Marlia, a mortal, is transformed into a mermaid by Dylan, a sea god, only to be cursed and separated from him. As Dylan searches the depths of the ocean for his lost love, Marlia lives unaware of his relentless quest. This enchanting tale of love, magic, and perseverance will captivate you as two souls fight to be reunited across the realms of sea and land. [Will be upgraded on the actual physical book]