After Tormenting Scum, the White Moonlight Bit the Substitute (Quick Transmigration)

[Quick Transmigration, Mutual Devotion. Reborn as the White Moonlight, Face-Slap the Scum Gong, Seduce the Substitute Shou. 1v1, Both Pure, HE. A gentle-hearted, unhinged, seductive vampire gong X a loyal human shou of uncertain temperament who occasionally loses it]

Pre-registration: "Everyone Hates Him, But He's the Big Brother's Wife". Blurb at the end:

[Blurb]

To resurrect his deceased lover, Qi An, the vampire Lu Jin binds himself to a Scum-and-Suffering System. He is transmigrated into a melodramatic scum romance novel as the unattainable White Moonlight of the scum gong, and sets out to compete with the suffering shou (the substitute shou) for the scum gong's attention, drive up the price, and thereby fuel the couple's relationship.

But... why do these suffering shous smell so much like his lover, Qi An? As the devoted gaze that once belonged to him alone is about to fall on someone else, Lu Jin can no longer keep his cool. He tears up the rival's script and sets out to put the scum gong in his place and seduce the suffering shou.

System: Host, please give up your wishful thinking and face reality. The suffering shou can only love the scum gong.

But...

The universally hated cross-dresser carefully places a key in his palm, tears falling as he says, "As long as you don't hate me, it's okay if you leave me."

The righteous exorcist holds his hand and presses a dagger to his own chin, smiling as brightly as the first time they met. "For a vengeful ghost to return to life, it needs the skin of someone with an extreme yin constitution. I have to start peeling here for it to be complete."

The darling of the cultivation world piles all the rare treasures before him, still thinking they aren't enough. With trembling hands, he starts to undress. "Master, you're so badly injured. Why not replenish your energy from your disciple?"

Lu Jin: Only love the scum gong? No, he can only love me.

He takes the key from the universally hated man's hand and casually throws it out the window. Then he lifts a hand to stroke the corner of the other's eye, speaking almost like a spell. "Darling, why don't you think carefully about what you should use to keep me here?"

He follows the exorcist's neck upward, scenting him. As his fangs graze against him, the tip of the dagger rests carelessly against the other's Adam's apple. "I hear that once you break your vows, you no longer have an extreme yin constitution. Exorcist, have you really forgotten everything that happened between us?"

He holds the cultivation prodigy's slender waist and teases him, though his expression remains perfectly serious. "The marriage ceremony is three days away. Is my good disciple already this eager?"

Through the cycles of one world after another, he defies the System's instructions again and again, bearing the ever-increasing punishments alone, until... he encounters another salvation System and finally understands that everything before this was an enormous deception. Qi An was always the love of his life, destined for him. There is no escaping it, no running away.

World One: [Modern wealthy family] Charming real young master gong X universally hated fake young master shou (cross-dresser version)

World Two: [Ancient supernatural] Wrathful Ghost King gong X initially foolish, later aloof exorcist shou ("pregnant belly" special)

World Three: [Cultivation] Master gong whose spiritual roots have been destroyed X merfolk leader disciple shou (lactation version)

World Four: [Original world] Younger, beautiful but tragic vampire gong X gentle, sunny vampire hunter shou

An unhinged younger gong who restrains his desires every day behind a cool facade X a gentle, loyal shou who thinks the child he raised is wonderful in every way and spoils him rotten

Actually, they're mutually devoted and spoil each other (whisper)

Note: The protagonist has half-vampire, half-succubus blood, and an extremely powerful golden finger.

Theme: I want you to stay warm and bright forever