What Should I Do After Getting Entangled with Two Protagonists?

Zhu Xingchen accidentally got handed the script of a "broken engagement" story. He became the protagonist's unattainable first love and beloved, earning the hatred of the protagonist after they turned dark. Zhu Xingchen: "It's not that I don't care about you. But you distract me and keep me from focusing on my cultivation. We're destined to love each other, but not to be together. Let's break off the engagement." The protagonist turns dark: "Bah! You faithless bastard!" Once he finished playing his part, Zhu Xingchen could return to modern times and enjoy life. But the protagonist's resentment ran too deep, the plot collapsed, and Zhu Xingchen was sent back again, this time to before the engagement was broken off. This time, he got a dating System. Well... fine. He admitted he had feelings for the protagonist. Zhu Xingchen pressed a hand to his chest. "Do you know which side my heart is on?" The protagonist: "The left." Zhu Xingchen shook his head. "No. It's on your side." The protagonist's handsome face flushed faintly. Wait, why had the darkened protagonist from the previous world come along too? The darkened protagonist ground his teeth. "Bah! Are you messing with me? I want to kill someone." Little scene: Zhu Xingchen pinned the protagonist against a tree as golden leaves drifted down. He lifted his eyes and said, "Spring has peach blossoms, autumn has frost flowers. What do all four seasons have? Do you know?" The protagonist asked, "What?" Zhu Xingchen gazed at him tenderly, his voice low. "You." The protagonist's eyes fixed on Zhu Xingchen, his gaze like a believer looking up at a god. His eyelids trembled as he closed his eyes, allowing Zhu Xingchen to draw near and kiss him. The darkened protagonist braced a hand against the tree, the corner of his mouth curling up. His voice sounded as though it came from hell. "Just try touching him." A humble plea for help: I want to fall in love. What do I do when someone keeps getting in the way? If I say my ex and my current lover are the same person, will anyone believe me? Theme: No matter what circumstances you find yourself in, your fate is in your own hands