The merfolk clan's most precious treasure, the Merfolk Seal, has been stolen. Ling Xi, the clan leader, discovers the seal's spiritual energy resonating in a mortal. To find it, he descends to the mortal realm in search of that person. By chance, he comes upon the mortal being hunted and saves them along the way.
As they spend day after day together, they fall for each other. But mortals and immortals are ultimately worlds apart. The mortal dies in a war, while Ling Xi possesses an endless lifespan. He turns the Three Realms upside down, but still cannot find the mortal's soul. The King of Hell tells Ling Xi that the mortal he seeks is no ordinary person: they are either a demon or an immortal...
One-on-one, male lead.
P.S. 1. There are many secondary couples, including a younger stepmother-type bottom and a cross-dressing bottom. Please steer clear if these aren't your thing.
2. A male supporting character has a pregnancy storyline. Please steer clear if this isn't your thing.
Theme: Love can overcome any hardship.