I went down to the second floor of the observatory deck and went to another side. The side I just left was the south and I was going to the north side. There were less people at the observatory deck of the north side and it was very quiet here. I noticed a foreign guy sitting on a chair looking at me scarily. I pretended not to look back at him. I finished looking the view here and went to the elevator. I was the only one waiting for the elevator. When the door of the elevator opened, the staff invited me to go in. At first I thought I would be the only one in the elevator but when the door was going to close, that guy came in the elevator suddenly so there would be only me and him in the elevator. I felt scared of him. The staff closed the elevator and bowed to me and him until the elevator closed. I wanted to go out of the elevator because I didn’t want to take the elevator with him alone but I knew it was too late. I pretended to act like usual. When the door of the elevator opened, I got out quickly and walked to the souvenir shop because I saw a lot of people there. He was still walking behind me. I pretended to look at the souvenirs and checked if he was still there. He stopped in front of the shop for a while and took an escalator to go down to the first floor. I felt much better.