After the Transmigrated Female Side Character Told Me I Was Cannon Fodder

A cannon fodder should act like cannon fodder. Yin? Cannon-fodder Princess? Yan Yu strictly follows this principle. For example:

Princess Anle bathes in fresh milk and brews tea with morning dew, with jade for bricks and gold and silver for tiles. Unlike the heroine, who wears simple clothes and pinches pennies;

Princess Anle has loving, devoted parents who cherish her like a treasure. Unlike the heroine, who treasures herself like a worn-out broom and is aloof and friendless;

Princess Anle is unreasonable and rude, arrogant and domineering. Unlike the heroine, who plans every step carefully and walks on eggshells;

Princess Anle...

The heroines: Do you want all this good fortune for yourself?

Ever since she befriended the Princess of Changping, who claimed to have transmigrated into a book, and learned that she was merely a cannon-fodder character who disappeared right after her first appearance, the pampered Princess Anle was left completely shaken.

Anle: So should I just do nothing and give up completely?

Changping: Actually... you could try getting closer to His Highness the Crown Prince.

Anle (hopeful): Is he secretly some powerful big shot?

Changping: Not exactly, but he's handsome!

After hearing this devastating news, Yin Yanyu decided to give up and, while she was at it, embark on an earth-shattering romance with her Crown Prince brother. As Changping put it, "German orthopedics: die with no regrets."

At last, on a dark and stormy night, the peerlessly graceful Crown Prince, as unshakable as an immortal, softened his jade-like face, a fine sheen of sweat glistening on him. His white brocade robe, with its red silk gauze, lay spread across the floor.

Princess Anle, showered with affection, clung to her imperial brother's shoulder, her lips slightly parted as she breathed softly against his white-jade neck and shoulder. Her little face crumpled in distress. So this was the truth behind her "disappearance"? If she'd known, how could she have walked right into the trap?

A little bonus scene:

Rumor had it that a banquet was being held at the Grand Princess's residence, and all the famous handsome men in the capital had come to attend, including the Heir of Prince Sui and Young Marquis Liu.

During the feast, Hanlin scholar Cao got drunk and pointed at the two men.

"The Heir of Prince Sui is radiant as the morning clouds, while Young Marquis Liu is fresh as a willow beneath the spring moon. What a dazzling sight this is, like seeing a whole display of precious jewels!"

A curious guest asked, "How do they compare with His Highness the Crown Prince?"

Lord Cao replied, "Without seeing Zidu, without seeing Zichong."

Changping was completely baffled. "What does that mean? I don't understand."

Hearing this, the young marquis beside her covered his mouth and laughingly teased her. "Silly girl, silly girl. He's saying that all of us vulgar beauties can't compare to His Highness the Crown Prince's immortal bearing."

Changping promptly went to tease the "missing" Yin Yanyu. Embarrassed and furious, Yanyu turned to the Crown Prince and mocked him bitterly: "Zidu and Zichong were true gentlemen. Are you?"

The Crown Prince casually set down his bamboo slips on the table, opened his wide sleeves, and drew Yin Yanyu into his arms. "My lady is so lovely and graceful that her virtuous reputation will never be forgotten. I would not dare call myself a gentleman."

Brilliant, peerless, immortal-like Crown Prince brother x adorable, willful, sincere Princess younger sister

The male and female leads are not biological siblings; there is more to their backgrounds than meets the eye.

Theme: Everything happens for the best.