Si Yucheng transmigrates into an old-fashioned romance novel as a cannon-fodder heir who disguises herself as a man. The moment she opens her eyes, she catches the heroine, Tang Yingxin, changing clothes, and gets bound to a conquest System. She's completely stunned: I-is this something I'm allowed to see?
After she finally completes the binding task, the System tells her it bound itself to the wrong person. She's completely stunned: Weren't I supposed to win over the vicious supporting female character, Princess Zhaoyang? Why am I trying to win the heart of Tang Yingxin, the prime minister's daughter?
When the gentle, sweet heroine from the original story turns into a scheming young lady, she's completely stunned: Weren't you supposed to be gentle, kind, beautiful, and gracious? How did you become so wicked?
When Si Yucheng discovers that Tang Yingxin can see the scrolling comments above her head, she's completely stunned: Weren't my thoughts supposed to be absolutely private? How can you see everything?
When Tang Yingxin corners Si Yucheng against a wall, her legs go weak. Tang Yingxin whispers, "If the heir runs away again, I'll put pictures of the heir dressed as a woman all over the capital, and have someone publish The Heir's Incense-Coil Chronicles."
Alternate ancient setting + transmigrate into a book + System
Theme: Spread happiness
