On Friday night, I wake up after passing out drunk. When I open my eyes, an unfamiliar big-titted older sister is lying somewhere in my apartment, carelessly sprawled out in a lazy, vulnerable pose. How did she get here? I can't remember anything at all. She greets me with a casual "Good morning~," then casually straddles me, rubbing her body against my crotch. With no trace of reason left, amidst her crude and erotic charm, I spend the entire Saturday—from morning through afternoon and into the night—repeatedly creampie-fucking her.