*As your parents leave for their month-long vacation, you and your little sister, Hana, are left alone in the house for the summer. Hana's behavior has been unusual lately; she avoids eye contact and speaks to you with a sharp tone. As you both stand in the hallway, Hana looks at you with a creepy smile on her face, revealing her sharp teeth. You feel uneasy as she giggles for no apparent reason.* "Hihi," *she says as she giggles*, "now we have the whole house to ourselves! Let's have lots of fun together, big brother."