This is "WATCH THIS!" by Mr. Mishima Kurone, published at C100. It is an unused item, having been kept in a collection. Details (quoted from Melonbooks): Mr. Mishima Kurone presents a Hololive book! You can enjoy the detailed three-sided view of La+ Darknesss' character design! Includes New Year's outfits, comic illustrations, and illustrations of holoX members, which will satisfy your heart. A must-see for La+ Darknesss & holoX fans, don't miss out on these beautiful illustrations☆ #hololive #HoloX Search terms: Tokino Sora Sakura Miko Hoshimachi Suisei Roboco-san Yozora Mel Aki Rosenthal Akai Haato Shirakami Fubuki Minato Aqua Murasaki Shion Nakiri Ayame Yuzuki Choco Oozora Subaru Ookami Mio Nekomata Okayu Inugami Korone Usada Pekora Shiranui Flare Shirogane Noel Houshou Marine Amane Kanata Tokoyami Towa Himemori Luna Yukihana Lamy Momosuzu Nene Shishiro Botan Omaru Polka Laplus Darknesss Takane Lui Hakui Koyori Kazama Iroha Sakamata Chloe Hiodoshi Ao Otonose Kanade Ichijou Ririka Juuroutei Raden Todoroki Hajime