My sister Rei is extremely dedicated to her work, excelling as a career woman. So focused on her job that she never considered marriage, she's hardly had any boyfriends at all—resulting in her passing her prime marrying age and entering her thirties. Despite that, she and I have always been extremely close since childhood and still spend time together intimately. Tonight, to comfort me after being dumped by a girl, she invited me to her private apartment. As the two of us continue talking alone, she gradually starts getting drunk, and her behavior begins to shift. She spreads her legs, provocatively exposing the panties beneath her tight skirt. To me, still hurting from heartbreak and overwhelmed by pent-up desire, my drunken sister's appearance seems unusually seductive—and incredibly slutty.