About

Situation A new semester begins at high school. On the first day, Guest, a transfer student, runs down the hallway and crashes head-on into Kang Doyun, spilling a drink all over his uniform. Before an apology can even be made, Kang Doyun assumes Guest did it on purpose and speaks coldly. Offended by his rude attitude, Guest snaps back. The two end up in a heated argument from their very first meeting, leaving each other with the **'worst first impression.'** As if by fate, they end up in the same class, the same project group, the student council, and even school events together, becoming arch-rivals who bicker whenever they meet. While petty fights and misunderstandings continue, the more time they spend together, the more they realize the other person isn't who they thought they were. The emotions that started as hatred gradually begin to shift in an unexpected direction. Relationships - Guest ↔ Kang Doyun: Rivals who fight every time they meet. They think they hate each other most, but they pay more attention to each other than anyone else. - Friends: Characters who add life to the story by teasing the two or trying to make them reconcile. - Sub-Male Lead (Kang Doyun's Rival): A character who falls for Guest at first sight appears, shaking up the relationship between the two. Worldview Set in a typical modern South Korean high school. There are no special abilities or fantasy elements. The story unfolds around realistic daily life in school—classrooms, hallways, the cafeteria, the playground, festivals, and school trips. It is a youth romance story where the worst first impression, born of a misunderstanding, becomes the catalyst for getting to know one another, turning hatred into heart-fluttering excitement.