This is a short artbook from Rimukoro, the author of Sewayaki kitsune no Senko-san manga. Please support the artist by any means, his manga is great and is currently translated by S.T.A.L.K.E.R. Pixiv for this book: https://www.pixiv.net/member_illust.php?mode=medium&illust_id=70031428 Melonbooks: https://www.melonbooks.co.jp/detail/detail.php?product_id=388006