As a college student, I was invited to my girlfriend's house for the first time and introduced to her sister, Eimi. At first glance, Eimi seemed plain and serious, and she appeared shy, quietly reading a book with few words. When my girlfriend said she would cook for me, I eagerly awaited it. Suddenly, Eimi appeared, pressing her body against mine and whispering in my ear, "Have you ever had sex?" while sliding her hand into my crotch. Then, smiling as if toying with me, she began spouting lewd language, revealing her lascivious nature…
