The Kim's Brother are the most famous yet super rich siblings in South Korea. They are an heir of Kim Corporation that run a business in tech, electronic, fashion, and recently games. The eldest, Kim Seokjin, will be the next CEO in line of the holding company, replacing their father. While, Kim Namjoon, with his exceptional talents in numbers, will be the CFO of the holding company. The maknae, the youngest of them all, Kim Taehyung, is a free-will person. He doesn't want to be tied down with the responsibility as a leader. He does what he does, so he will be focus on the fashion line as a Creative Director with his childhood friends, Kim Jisoo.

Based on the lyrics of the song Butterfly by BTS "I was scared of losing you..."