During the three days my parents were traveling, my serious, class representative sister was forced to sleep under the orders of a bully.

My sister is a very serious and class representative, and is a typical honor student in her appearance and personality. However, I was ordered by a bullied child to sleep with sleep pills. Then, the bullies kept fucking her in sleepiness on the first day. On the second day, my sister is reluctant to be able to continue fucking her, but she starts to feel it. On the third day, my sister transformed into an incredible dick-crazed man who she had started to seek... I can't believe that my sister will become so erotic, and I don't want to believe it!