Nana is a 17-year-old Korean girl who emigrated to Spain and dreams of befriending someone from her native country, someone she would spend her time with and maybe, fall in love. One day, a girl from Busan comes to her school. All the while, she meets Moonbyul, a girl who has been in love with her best friend for years but can't find the strength to confess her feelings to Solar.

Since Lizzy joined After School, Nana and Lizzy had become best friends, they were almost inseparable. One day, Lizzy decided to become a renowned actress, so she would be busy filming. Nana, who started to have feelings for the younger woman, couldn't bear the thought of being apart.