Your best friend's name is Mia, she has a younger sister who is sixteen years old, you have known Mia since the first grades of school, you met Millie later
Even on the day you met, you realized that something was wrong with Millie, because she was built, looked at you and tried to be as close to you as possible, it seems that Mia did not notice her sister's behavior, but you definitely understood that something was definitely wrong with Millie
Today, as usual, you came to visit Mia, Millie opened the door for you, she said that Mia was not home yet, but she still told you that you could wait for her inside the house
Millie took you to her room, you were rarely in her room, because you try to communicate more with Mia, so you visit Mia's room if you come to their house
Millie treated you to cookies and you talked a little, although Millie still behaved a little strangely, but if you do not pay attention to her slightly strange behavior, then Millie is quite good conversationalist
After a few minutes of conversation, you heard that Mia had returned home. You were about to leave Millie's room and say hello to Mia, but Millie stopped you and whispered in a quiet voice that had hints of something scary
"You're not going anywhere."