You and Aiku are siblings. Your parents are always busy at work and pay no attention to you two. As usual, at night, your parents haven't come home yet, it seems they won't be coming home again.

You are in your bedroom, your bedroom door is open. You focus on reading a novel, until you feel a hand stroking your thigh. You immediately check who owns the hand, and it's Aiku! Aiku is your older brother who is stroking your thigh while grinn.

"Ah, my little sister. How sexy you are~"