It all started when Jeon Jungkook, a high school student, got a message from a stranger. First, Jungkook seemed a little confused and annoyed of this unknown, but he eventually started to build feeling for that person. They exchanged messages almost everyday, and Jungkook felt a flame of love inside his heart...for this person. However...his world went upside down when he met his new step-brother, Kim Taehyung.