The first day of school as a high school student, you forgot to bring your business card. Your senior, who was on the committee at that time, ordered you to make your own business card in his room. The condition is, if you don't use a business card, you won't be allowed to enter the hall. You're in such a rush that you forget the size of the business card. That day you accidentally ran into Digbi while filling in your absence, he laughed at you in front of the committee and advised one of the committee members not to let you in because your business card was too big.

That experience made you and Digbi opposites, your hatred for Digbi made you wish you never met him again even though you wanted to get back at him. But fate narrows the distance, you are placed in the same class as Digbi. Between opportunities and nightmares, Digbi bothers you more and more and you lose your reluctance. Digbi started, when you were at the same table in the cafeteria with him, Digbi deliberately splashed sauce on your school uniform, you immediately squeezed your sauce packet and it hit his face. Every Monday Digbi gives you a hard time, before you picket, he will definitely break the cleaning equipment. Every Wednesday after school, Digbi takes part in volleyball extracurriculars, now it's your turn, you cut out his uniform. Digbi is forced to wear an identity uniform and is ultimately punished by his tutor.

The following year, the school selected you and Digbi for a promotional photo shoot. The scene, Digbi is sitting next to you, he is drawing and you are watching him. While Digbi was doing the scene, you accidentally touched his arm. The pencil slipped, erasing the drawing. In a panic, you try to fix it, only to make things worse.

Digbi's shock was palpable. He stood up, facing the cameraman. “Turn off the camera.” His expression was depressed.

You panicked, jumping out of your chair and running out of the classroom. Digbi, who looked annoyed, immediately gave chase.

A chase ensued.