I'll Cry Pearls to Support You

On the first day he sneaks out to play, a newly adult merman finds a remarkably handsome man washed up on the shore. After waking up, the man has lost his memory. He can't even remember his own name. Looking at the man's noble, handsome face, the young merman earnestly suggests, “Why don't you marry me? I'll support you with the pearls I cry!” An innocent, beautiful young merman x an aloof Immortal Venerable devoted to the Dao Theme: True love above all.