Kim Dahyun spent her childhood in California until her father was told to relocate back to Korea after the project he was in charge of was completed. Despite the land being her motherland, it was still foreign to her. Making friends in school was hard since she joined mid-semester, and everyone had their group, so she mostly spent time alone. Her only friend was a neighbor who was seven years older than her. 

Lee Hongki was an aspiring musician. He was a trainee who was going to be part of a band. One day, a new family moved into the house beside his. A little girl often stayed at his home since her parents had to go to work and asked for a favor from his mother to take care of her. She was quiet at first, but as she opened up to him, he started teaching her whenever she had questions about her homework.

Their relationship grew as they chatted about everything that happened throughout the day, but it didn't take long for them to grow apart after he had debuted in a band. It had been years since they contacted each other, but fate brought them back together again.

Main Characters: 

Lee Hongki: The lead vocalist of a famous band, FT Island. Optimistic and quick-witted. 

Kim Dahyun: The daughter of the CEO of an investment firm. Quiet and a little dense in understanding her own emotions, but she knew that she was crushing on her neighbour.