This is a photo of Maki Goto from Morning Musume during their peak, about 30 years ago. The material is paper. It's the size of a photo card. I got it as a bonus when I was in the lower grades of elementary school, and I kept it in a photo frame for a long time. There's some yellowing on the back (on the edge of the 5th photo). For those who want to reminisce about the good old days of the Heisei era, please take a look.