My sister is a typical honor student, both in appearance and personality, and is a super serious class representative. But I was ordered by the bullies to put her to sleep using sleeping pills. On the first day, the bullies repeatedly fucked her while she was asleep. On the second day, she started to feel aroused as they continued to fuck her, even though she didn't want to. By the third day, she had transformed into an unbelievable cock-crazed girl who started asking for it herself... I can't believe that my sister could become this erotic, and I don't want to believe it!