Yu Linyi transmigrated into a book, becoming the doomed childhood friend of the protagonist shou in a danmei tragedy he'd recently read.
In the book, the protagonist shou fell in love with the protagonist gong at first sight and was hopelessly devoted to him. Even though the other man had terrible morals, an awful personality, and a reputation for being a playboy, with only his face going for him, the protagonist shou was so blinded by love he couldn't see a single flaw. He loved him wholeheartedly, and after a series of physically and emotionally torturous encounters, the two got their happy ending.
Yu Linyi: ? I respect it, wish you well, and hope you stay together forever.
But when he arrived in this world, he found that the protagonist shou was soft and sweet, as adorable as a little white dumpling. The boy blinked his grape-like eyes and obediently called him, "Brother Xiaoyi."
Yu Linyi remained unmoved. After three seconds of careful thought, he decided: Maybe this love-struck fool can still be saved.
Hehe, Brother Xiaoyi's here to play in the mud with you!
To save his little dumpling, Yu Linyi made him agree to three rules.
"If you want to keep playing with Brother Xiaoyi, you have to do three things."
Jiang Yangxi nodded eagerly.
"First, if you ever meet someone named Song Tingfeng, run straight home!"
"Second, if you ever realize you like someone, tell Brother Xiaoyi right away so I can vet them!"
"Third, whenever Brother Xiaoyi wants to pinch your cheeks, you have to let him!"
Jiang Yangxi nodded blankly, and his soft, fair cheek got pinched again.
Jiang Yangxi: QAQ
Later, when the little dumpling had grown up, he came over bashfully. "Brother Xiaoyi, there's someone I like."
Yu Linyi was wary. "It's not Song Tingfeng, is it?"
Jiang Yangxi shook his head.
Yu Linyi sighed with relief. It seemed his little dumpling's happiness was safe after all. His mission was complete, and he could leave in peace.
"The person I like is you, Brother Xiaoyi."
Yu Linyi: ?
Hey, this isn't how the story is supposed to go!
Much later, Yu Linyi got up from the bed, holding his aching waist, feeling rather frustrated.
Wasn't he supposed to be the shou? How come he's so good at this?
* The original shou becomes the gong; Jiang Yangxi is the gong.
* A story about raising a child. Before the confession, the shou has no romantic feelings for the gong.
* A sweet-talking, seemingly innocent but secretly calculating gong x a carefree, easygoing shou.
Theme: Beware of the grass by your doorstep, or the rabbit might eat you instead (sobs).