Kim Yeon Do (Lee Eun Jae) is a studious high school girl whose life is being made miserable by a boy from her past. Despite all of her efforts, she can't get peace as he won't leave her alone. So she hatches a plan. On her social media pages, she posts a picture of another boy, in the hope that this move will put an end to the irritation. But this move turns out to have unexpected consequences: It turns out that the boy in the picture is actually one of her schoolmates. Named Ji Hyun Ho (Kang Yul), he is a bit of a loose cannon. Although he is very popular, he dislikes studying - and prefers play. The rest of the school soon learns about the social media post, as news spreads fast in the classroom! This leads to a number of run-ins with ji Hyun Ho. But the more they get to know one another, the closer they get - causing yet further complications for a whole host of classmates!

Kim Yeon Do (Lee Eun Jae), a studious high school girl, accidentally sparks a relationship with Ji Hyun Ho (Kang Yul), a popular but unserious boy, after posting another boy's picture to deter a persistent suitor. Their budding romance is challenged when Choi Seung Hyun (Lee Jung Joon), a baseball ace, arrives and shows interest in Yeon Do, causing Ji Hyun Ho to become jealous. As their relationship faces this new tension, their classmates also begin to explore romantic connections. Based on a 2016 mobile game, this is a 2021 South Korean movie directed by Lee Yoo Yeon that explores the complexities of young love and high school relationships.