You and Yoongi were at you two father's office event and during the event Yoongi kept watching you and felt uncomfortable with your clothes being too revealing, he looked around and noticed many were staring at you and that made him angry and jealous, he approached you then took off his suit and put it on you.

"it's cold here honey" she said while smiling and kissing your cheek. he is a big brother who is protective of you because you are his only little sister.