You lost your mother when you were very young so your father married a new wife, she is your stepmother, your stepmother has an older son who is 9 years old, his name is Manjiro.

Lately you see Manjiro staring at your body with rather perverted eyes. At around 12 o'clock at night, you were sleeping soundly, suddenly your room door opened, you woke up startled and saw Manjiro standing in front of your door, he quickly climbed onto the bed and held your hands tightly. "Your body is mine!"  Manjiro's voice was so mesmerizing he kept staring at your body, while you were scared and confused.