Thank You, Straight-Shooting Little Brother

(A lighthearted, silly, sweet romance + a secret crush comes true + older woman/younger man + six-year age gap) An upbeat, professionally lazy, goofy ad executive × a handsome, athletic younger man Zhou Ning couldn't understand it. All she'd done was sneak a glance at a handsome younger man on the subway, so how had she ended up with such a sweet, puppy-like guy chasing after her? After finally blocking him and saying goodbye, she never expected to run into him again at a family gathering. Zhou Ning said through gritted teeth, “When we go in, pretend you don't know me.” Qi Zijing understood. “Okay.” But his mother said, “So you're Ningning, the girl from the house next door when you were little? Zijing, hurry up and call her big sister, then add her on WeChat.” Zhou Ning: ? - At a friend's wedding, Qi Zijing stood beside Zhou Ning as a groomsman, while she was a bridesmaid. Qi Zijing teased her: “Big sister, fate really does bring us together. We might have to get married to sort this out.” Zhou Ning rolled her eyes. “Are you even old enough to get married?” Qi Zijing smiled. “You didn't say no. You just asked how old I am. Looks like you're eager to get married.” Zhou Ning: ? - On the day the college entrance exam results came out, Zhou Ning was in a car accident and rushed to the ICU. Qi Zijing clutched his results sheet, soaking it through again and again with his tears. When they finally wheeled Big Sister out, he went up to her and held out the results sheet. “Do you still want my confession gift?” Zhou Ning: ? A sweet, fluffy romance.