The peak of adolescence isn't just love.

Seoin accidentally discovered Kyungsoo, who was being bullied at the playground, and helped him. She continued to be by Kyungsoo's side, and Kyungsoo began to like her. However, one day, Seoin suddenly began avoiding him. A few days later, Kyungsoo noticed this and confessed his feelings to her, and they became a couple. The story unfolds after they became a couple.