Wen Sitau, an old hand in the Tools-and-Extras Mentorship Department of the Book Transmigration Bureau, only has one last mission to complete before she can claim her retirement package.
However...
Wen Sitau, horrified: "What?! You're saying the System over at Central malfunctioned and assigned me to the Redemption Department, sending me into a romance novel to save a villainous male lead?!"
Wen Sitau, furious: "My whole career has been about no romance! Do you even know what 'no romance' means?!"
Over the years, she's transmigrated into a face-slapping story as the System, helping the protagonist fight their way up from nothing and slap down their rivals.
She's transmigrated into a cultivation story as the protagonist's master, sacrificing herself just as the protagonist's Dao heart wavered and they were about to fall into demonic corruption.
She's also been a goddess in a Western fantasy story, a witch in a fantasy story, a teacher in a school story, and a killer with a secret identity in a story about hidden identities...
Her only job was to offer the protagonist guidance whenever they were confused and at a loss!
The System trembled: [Actually... both departments have a bit of a spirit of selfless service to the people, so in special circumstances they can switch between each other. What do you think?]
Wen Sitau: "...Get lost."
The novel she's about to transmigrate into this time is a redemption story set in a futuristic interstellar world. The male lead, Ning Yizhe, is the Alliance's youngest first-class commander. After devoting over a decade to the Alliance, he ends up plagued by illness, crippled in both legs, and forced to marry into the family of a useless princess.
His reason for turning evil is at least somewhat convincing.
Except...
"Isn't this book already a redemption story?"
The useless princess saves the fallen commander, helping him stop hating the Alliance and learn to love life and the world again.
How lovely.
Wen Sitau eyed the situation suspiciously. "Why do they need to hire someone to play a role?"
The System: [Because the original heroine ran away.]
Wen Sitau: "?"
The System: [The male lead awakened to his own consciousness and didn't believe he could fall in love with his enemy's daughter. He cut the heroine down on their wedding day.]
With the heroine dead, the world collapsed, leaving them no choice but to ask the Book Transmigration Bureau for a professional.
Wen Sitau: "...You're sending me to my death."
The System, bashful: [You're experienced. You won't die that easily.]
Wen Sitau: "..."
Wen Sitau smiled. "I don't think this mission should be called 'Redeeming the Villainous Male Lead.'"
The System: [Then what should it be called?]
"The Cannon Fodder Heroine's Survival Guide."
Message: Seek medical attention in time.