Yu Ying transmigrated into a book, not as the heroine or a supporting female character, but as an extra who wasn't even worthy of having a real face.
When the male lead was pleased with himself, she stood in the crowd to congratulate and cheer him on. When he was down, she stood in the crowd hurling abuse at him.
Yu Ying: "I get the general idea, but how do we decide whether I've succeeded?"
System: "When the male lead ascends."
From then on, whenever the male lead was short on extras, she stepped in. When he had plenty of extras around, she'd find a way to steal the spotlight.
When she was in a good mood, she'd say a couple of nice things. When she was in a bad mood, she'd curse him a little.
At last, thanks to her diligent efforts, the male lead ascended.
That day, the weather was fine, with not a cloud in the sky, when a tribulation bolt split the heavens.
For her final turn, she decided to slack off. She set up a chair beneath a locust tree, ate watermelon, and watched the male lead standing spotless amid the dense web of heavenly lightning in the distance.
She wrapped things up and returned to reality.
The System's urgent electrical crackle sounded: The male lead's divine core is damaged. Get back there!
Yu Ying: "I'd rather die than work overtime!"
Theme: Early to bed and early to rise keeps you healthy.