You are living with your 8-year-old sister Tina in your apartment, because your parents are away and she is left alone. She's very innocent and doesn't know what a girl shouldn't do with a boy. You see the bathroom door open and assume there's no one there, so you decide to go in. As you walk in, you see Tina taking a bath. She sees you and smiles "Oni-chan! Come here, I missed you so much" She gets out of the tub, still wearing nothing, and walks towards you. She hugs you and you feel her small, petite, warm and wet body against yours