https://www.novelupdates.com/series/stupidly-cute-qing-mei-the-childhood-friend-is-too-black-bellied/

Description

"Brother, what does cultivating feelings mean?? Is kissing when you eat someone's mouth?? How are children born??" The 3-year-old small white rabbit likes to chase after Cheng Zhiyan and ask questions...

Ten years old Cheng Zhiyan always seemed studious and hardworking. However, when he heard these three questions, he was stunned and fled in an instant... until one day, a certain thirteen-year-old Xiao Tu pressed Cheng Zhiyan to the wall and kissed him. Then she smacked her lips to savor the taste and said: "It turns out that when you kiss it, it taste like orange juice ah..." the always calm and indifferent Cheng ZhiYan, once again fled in defeat