[Plot Breakdown + System Possessed + Forbidden Grounds Nurturing]
Protagonist Lu Xun saves his master’s wife, a Demon Emperor whose failed attempt to be reborn has left her utterly heartbroken, during the calamity of his master’s wedding. The “Harem System” inside him is forcibly possessed by the “Pure Love Obsession” of his tragically deceased master, and every “conquest mission” is rewritten as “protect her at all costs.” The two fall into the Immortal Burial Gorge, where time is distorted: one year outside equals a thousand years inside. Under the System’s coercion and his master’s watchful eye, Lu Xun spends a thousand years clumsily protecting his sickly, revenge-driven master’s wife, nurturing her into a “Guardian Demon Emperor” with a pathological possessiveness toward him. In the end, the two divine beings return and crush the cultivation world.
It's a pure love story, probably written by a girl; the emotions are portrayed very delicately.