In the video, a woman is standing in front of a chalkboard with a mathematical equation written on it. She is wearing a yellow top and has her hair styled in a bun. She is holding a piece of chalk in her hand and appears to be explaining the equation to someone. The equation on the board reads \"18-3=6+4+\".\n\nA man is standing next to the woman, wearing a blue shirt with a geometric pattern. He is holding a piece of chalk and seems to be listening to the woman's explanation. He then proceeds to write on the board, adding a plus sign to the end of the equation, which changes it to \"18-3=6+4+\".\n\nThe woman then turns to face the man and appears to be surprised or confused by his addition. She looks at the board and then back at the man, who is now smiling and looking at her with a playful expression. The video ends with the woman looking back at the board and the man smiling at her.