Break Through Me (Bts FF)(stepbrothers)

main female lead:Park bom
she has a heart of an ice! her past is unbearable! shes immune to pain! theres only 3 people she cares in this world and those are her bestfriend her step mother and step sister , shed do anything to keep them safe specially her step sister whose name is Park Nayeon. Park nayeon is the opposite of Park bom .she is an angel but is very naive. she loves park bom alot (like a sister). park bom is the protector of her sister. nayeon is a nerd so shes often bullied.will she change??what happens when their mother brings a shocking news? will she be able to accept them?or will they be able to accept them?
will they be able to show bom what love is and what she has been missing out on her life?will the people she trust change??will shebe able yo protect everyone from the danger thats coming...