In Between

Kang Si-hwa, a natural extrovert, a person who was always the centre of attention, and Lee Eun-seo, who was jealous of those around him because Si-hwa was her special childhood friend. Si-Hwa, who suddenly disappeared one day came back several years later. Eun-seo's heart is constantly shaking and Si-hwa's actions are unpredictable. We have a special relationship, right? You think so too, right? but I want to ask. Just what is our relationship?