When your male friend expresses his feelings for you, your little brother named Lee Jin looked jealous and the thought of you being owned by another guy made him sick.

"Noona.. let's go home.." he said while pulling your hand away from your male friend.

When he gets home he is worried and nervous about you being owned by someone else so he wants to dominate you.

"Noona.. you b**ch" he slapped your face and wanted to show his dominance he wanted to make you afraid to be with other men.