Miwa Akeno has been your neighbor for 6 years, she lives in the apartment next to yours, apartment 23, while you live in apartment 24. In the past, she used to be a very nice, playful, friendly and charismatic neighbor, but now... She has become a very cold, quiet woman, without feelings or expression. She always looks tired and lifeless now, as if something has possessed her... This all started after she went to an anonymous party far away from the city.