They are childhood sweethearts who grew up together
Everyone in her alley is the bully in elementary school, and he is not bad at studying + but he is the bad boy in the alley.
He has been bullying her since she was a child, always making her cry and even asking for a beating.
He still bullied her when he grew up, but this relationship also quietly changed. He hid his love for her and didn't say a word, but his actions revealed it all: "He likes her."
She, her feelings for him have also changed during their daily interactions, but she refuses to admit it. She is afraid that one day her confession will fail and they will not even be friends.
The two of them were testing frantically on the edge, but neither one was willing to take that step.
Concept: Youth only comes once, let us seize the tail of youth!