shock! My older sister, who is super serious at home and goes to a famous preparatory school, is actually a slut! What's more, all of my sister's friends, who appear to be honor students, are also sluts, so they come to my sister's room (which I share) and seduce me sexually from the top of the bunk bed, and devour me all the time.

Unlike me, who is a fool, my older sister who is very serious and has a very high deviation score is actually a slut? Such an idiot! It was hard to believe that this rumor was true. Moreover, my sister's friend who often comes to visit us is also a slut... Honestly, I'm really excited! Because I'm having sex with my sister's friends.