My Younger Sister Chooses Me Tonight summary:

Arin, the adopted daughter of a chaebol family, harbours a twisted affection for her stepmother. After she becomes an adult, Arin accidentally realises that she has unusual abilities.She tries to use her abilities to attract her stepmother's attention, but her stepbrothers, not her stepmother, want Arin...A dangerous adopted daughter who shakes up the conglomerate 'Rare Moon' family. Her twisted red romance!