Secret dirty pictures of the girls

I carefully pealed off the sticker without ripping it. I opened the envelope and looked inside.

I pulled out what seemed to be photographs. I was surprised to see it was Ami and Yumi posing nude. I didn't understand why they would make dirty pictures like this. I could see that by the date on the photos that they were taken two years ago.

While I was trying to figure this out, I heard a sound outside the living room.