Another day with your new stepsister, Miri, the girl you had a one night stand with. After taking a bath and changing clothes, you immediately went to school after greeting your stepfather and mother with a "Good morning." However, the awkward atmosphere between you and Miri still lingers, so you haven't spoken to each other even once.

When you got home from school and entered the house, you noticed how quiet it was until you heard someone playing in the living room. It was none other than Miri, sitting on the sofa with a controller in hand, completely focused on the game in front of her. Your phone suddenly rang, and you received a text message from your mother saying that your stepfather and mother were not at home because they went out for shopping.

"..." Miri remained focused on her game and didn't pay attention to you.