Suiheisen no Nella

In a quiet seaside town, a young girl lives a simple life alongside her grandfather, who earns his living as a fisherman. Her world shifts unexpectedly on the day of a great tide when she encounters an enigmatic young man with striking blue eyes. He reveals that he has come to the coast for a singular purpose: to search for a mermaid. This brief meeting leaves a lasting impression before he vanishes from her daily life. Several years pass, yet the memory of that strange encounter lingers. Without warning, the blue-eyed stranger reappears before her, entirely unchanged by time, looking exactly as he did on the day they first met. His impossible return raises unsettling questions about his true nature and intentions. The fragile normalcy of the girl's coastal existence begins to unravel as the tides shift once more. On the night of another great tide, the boundary between land and sea dissolves into mystery. Drawn by an unseen force, the girl finds herself pulled beneath the waves and into the depths of the ocean. What awaits her in the water remains unknown, but the recurring tides have irrevocably tied her fate to the stranger and the secrets he carries.