I Must Save the Male Lead Today Too [Quick Transmigration]

Shang Jin woke up one day to find himself inexplicably bound to a System. The System threatened to lock him in a dark room if he didn't complete its tasks. The tasks were all over the place, but in short, they involved transmigrating into a novel as a disposable side character and using love to soften the emotionally unavailable male lead. Shang Jin took the scripts and read: First life: See that throne? I'd give it to your third brother before I'd give it to you! Second life: My adoptive older brother is so easy to bully... Wait, I'm the one who was adopted? Third life: You actually made me your stand-in? Damn it, I'll steal your confidential files! Shang Jin closed the script. What the hell? What was this story supposed to be called, How to Win Over the Male Lead, or A Disposable Character's Many Ways to Save Himself? In the end, seeing that he couldn't get around the System, Shang Jin could only start his acting career with tears in his eyes. Huh? The male lead doesn't seem as bad as the rumors say. Huh? Why does the male lead look the same in every world? Huh? The right way to win him over is to fall in love with him? Shang Jin proudly gave himself a thumbs-up. I'm such a clever little genius! Note: [Cold on the outside, warm on the inside, with a rich inner life gong x well-behaved, adorable, diligent shou.] No face-slapping. The shou is just a naive sweetheart. A sweet little story dressed up as a rescue mission, with a lighthearted style. Enjoy! There may be angst now and then! Theme: