This is a letter set with a mature feel from Tetsuko Kuroyanagi. There are six envelopes, but the number of sheets of writing paper is unknown. It is likely that there are a similar number of sheets as envelopes. It is new, but it has been stored at home for a long time, so please consider this if you don't mind. I think it was a gift when I purchased a Totto-chan T-shirt, but my memory is vague. Since the names of TV Asahi and the official office are included, it may be related merchandise.