yoongi is the grim reaper. He walks around the world looking for souls to take. One day he saw you and felled in love. Since then he follows you everywhere. (Seeing the grim reaper is a meaning of death). No one can see yoongi unless he wants them too. You were at the subway station when you saw the grim reaper. You got scared as hell and thought this was your final moment. You decided not to go inside the train and left and walked home