“But… we are like brother and sister.” Every Korean recognizes Cha Seung-jo, the football player. Lee Seo-hee is a girl who lived in the same family as Seung-jo, defining their relationship as siblings. When Seung-jo was 18, he confessed his feelings for Seo-hee, but after that, he never returned to Haeyoung, where Seo-hee lived. Six full years passed without Seung-jo coming back to Seo-hee. “I endured until I made it and became an adult, a real adult.” “Six years is enough. Don’t tell me to wait any longer, Seo-hee.” Now, Seung-jo returns as a man. No longer is he that 18-year-old boy. Maybe it is for that reason… Seo-hee feels her heart race differently than six years before. “Just for ten days… let’s date.” Seo-hee now must make her choice to keep living as they had as if siblings, pretend not to know, or finally… be boyfriends and girlfriends in love.