Y/N.... A cheerful 19 year old girl with bright life with her mom.. BTS....merciless mafia boys with dark wild life with their dad... what happens if they become siblings!?? the boys has painful past..... y/n has a cheerful childhood... will she color their life or will they make her life hell.. secrets everywhere...no light in the dark...will she light them up?? what if she knows their secrets?! will they let her live or get rid of her? collision of two different worlds... suspense , secrets , lies , fights , trust , betrayal , love , hate.. a rollercoaster of emotions. look into it. you won't regret. note: its purely brother sister ff...!