My Childhood Sweetheart and My Little Bear Feel the Same Way

I'm Looking for an Article About Childhood Sweethearts Who Like Each Other Without Knowing It.

It's best if the boy is sunny and cheerful (I don't want a cold-blooded male god), with average grades. The girl is lively and has good grades/white and black, a good student on the outside, a little wild behind the scenes, and a strict family. They can get along with each other in a confrontational way, and they like each other without knowing it.