My Rude step brothers and sisters

Yn is a cold hearted girl, merciless and a mafia with mysterious past. No one knows her much. She is the only daughter of her mother. After her dad was killed By her enemy, her mother started dating.
Will yn accept her bf as her dad?
Will bts and blackpink sons and daughters of Yn's mom's bf accept them?
Will bts and blackpink get to know about yn?
Will yn ever change her behaviour towards bangpink?

Read to find out!!