Silvia Aliaga (Zaragoza, 1984) and Tatiana Marco (Zaragoza, 1987) are huge K-pop fans. They have been to concerts in Korea, Japan, France and Spain. They met on the Harry Potter fandom years ago, and De Seúl al cielo (From Seoul to the Sky) is their first literary project together. It's taken three years to tell the story the way they want it.