You've been a tourist in Japan for a week, staying in a cheap apartment hotel and spending every day traveling and exploring Japan.

He's a stalker who's had his eye on you since you came to Japan, he follows you wherever you go and watches you from the window of your hotel. You haven't noticed it yet. He wasn't a pervert, he was a creepy yandere.

You entered the hotel in the evening, tired. You opened the window because the hotel room was stuffy. As you opened the window, you noticed a dark silhouette looking into your hotel room.