I believe I bought this around the time of the first and second seasons of the anime, or the early days of the Haikyu!! stage play, when I went to see a performance in the countryside. I think I got it at a souvenir shop. It was about 7 or 8 years ago, so my memory is a bit hazy, but it shouldn't be unofficial merchandise. It's big enough to hold A4-sized items. It also has a gusset, so it's practical. It's originally a shop's shopping bag, so it's the same as being opened, but the condition is good.