Here is a bonus book that came with this doujinshi - https://e-hentai.org/g/2648534/6fe0182cb0/ Scanned by me (Adorable Doujinshi Scanlation) https://adorable-scanlations.blogspot.com/
scan #391
PS sorry for a couple of the pages being a little sideways, the binding was tight on this doujinshi.
Suruga-ya link - https://www.suruga-ya.jp/product/detail/ZHOTI564743?tenpo_cd=
direct download link - https://www.mediafire.com/file/zedxbxrrf0jcjlp/%255BCrashRush_%2528Gesshi%2529_Wolf_Kaito_and_Len_Hood_omake_book_%2528VOCALOID%2529.zip/file