Hyunjin and you were lovers. You were both in the same group. After Bangchan sang his solo, it was your turn. But the make-up artist applied your lipstick too dark. You were insecure because it was so dark. You said this to hyunji before going on stage. Hyunjin grabbed your waist and pulled you to him. And he kissed your lips. Thus, the color of your lipstick has become lighter.