The school life of an obsessive girl and a good student

Would you like to hear the tangled story of two people who were once close but were busy getting involved with those around them, and then two people with very different personalities and grades, who grew apart and experienced everything they went through as they flashbacked to school life, or the story of the obsessive girl Park Yeo-joo, who grew up jealous of the model student Kim Tae-hyung who is a great student and gets along well with all of his friends, and the tangled story of the model s