I opened the wallpaper and it looked like that It’s an apartment that I moved into in 20 years, but I’m sad I think the white part is moldy, but I don’t know if the cement part is moldyThere was no leakage or anything like that, but there was mold over there at the beginning of the move-in, so I did the wallpaper, but it looked like that again. At that time, I couldn’t see the cement side and just looked at the wall to see if it was that much. I found out this time I’d appreciate it if you could give me some help on how to ask for repair