My Younger Sister Chooses Me Tonight summary:
Arin, the adopted daughter of a chaebol family, harbors a twisted affection for her stepmother. After she becomes an adult, Arin accidentally realizes that she has unusual abilities. She tries to use her powers to get her stepmom's attention, but it's her stepbrothers who want Arin, not her stepmom... A dangerous adopted daughter who shakes up the conglomerate 'Rare Moon' family. Her twisted red romance!