This is a cream-colored, size L "Bikkuri Ookami-kun" T-shirt by Kiriko Arai. I bought it a few years ago at Fewmany in Shinjuku, but I never wore it and it's been stored in my closet. While the white version is available at ARTIST DELI SHOPPING, I believe the cream color is currently unavailable. (See photo 5 for the white version.) You can see from the tag photo that it is not white. It has been folded and stored in a cool, dark place, so there are some fold lines, but it is new and unused.