A little boy (Jimin) who's lovely elder brother (miller) was abounded by his father when his mother life is hard, living her life to death in hospital. He met a kid (jungkook) and played along with one more kid(taemin) in his childhood. Jungkook, who used to play with Jimin along and give him berry chocolates on his birthday prepared by jungkook's mother. Later on after some months, jungkook's family got away and left the city for false rumors spread by the city members. Jimin and Jungkook were separated and missed eachother in their childhood. Jimin was abounded again by his father after his mother's death.
Days passed on, Jungkook's parents were murdered and it was accused as accident and the case was closed. Jungkook was all alone and met some good members and they took care of jungkook, the members are(Jin, Yoongi). Soon after jungkook became a normal guy infront of only a single member(lilly) who took care of him and later proposed then got rejected by jungkook, because jungkook still has his heart unfilled and waiting for his childhood friend Jimin who spend his most of happy moments with. Then jungkook promises to take care of her as a friend and give his support in her life.
After many years, jungkook lost his innocence and sensitivity and became one of gangster to avoid accidents like happened to his parents who's not known to the real world and he's no longer a kid. Jimin was innocent and feminine and got a shoulder to lay on(hoseok/hobi) hobi, friend of Jimin who got abounded to the same owner. Taehyung is a friend who got close to Jimin when Jimin got his job in RM company in which Namjoon, Jin, Suga, Jungkook, Minjae are partners with Jungkook in major partnership.
When Jungkook meets Jimin in various circumstances and they get to know eachother as their childhood friends. But Miller( Jimin's brother) who became a criminal unfortunately shoots Lilly ( who proposed and got rejected by jungkook) will he keep the promise and try to keep lilly safe and kill Jimin's brother. While Jimin opposes jungkook to standby and show mercy cause his brother miller is used to the job and there only the family left to eachother.
They'll understand eachother and compromise and what will happen to the other members bonding which are bonded with Jungkook, Jimin lives.