Cheng Miao and Cheng Mai have known each other since they were born.
Cheng Miao is much smarter than Cheng Mai. He has known for a long time that he likes Cheng Mai.
The same cannot be said for Cheng Mai, he is relatively slow, and he didn't realize it until he really liked Cheng Miao very much.
Cheng Miao doted on Cheng Mai, but he would also be angry with Cheng Mai, but it was useless to be angry. He would surrender as long as Cheng Mai acted mischievously.
Cheng Mai sometimes behaves like a child because Cheng Miao is nice to him, but he is very good. When he makes a mistake, he will take the initiative to apologize to Cheng Mai and never be harsh.
Yes, my childhood sweethearts of more than 20 years know each other well, and they can make do with each other, so they don't waste their time on falling in love with others.